Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Reexamination Certificate
2007-11-13
2007-11-13
Isabella, David J. (Department: 3738)
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
C424S423000, C216S075000, C623S901000, C623S001390
Reexamination Certificate
active
10713244
ABSTRACT:
Methods for fabricating a medical device having at least one porous layer include providing a medical device having at least one alloy and removing at least one component of the alloy to form the porous layer. Although methods may be used to make stent devices with porous layers, any other suitable medical device may be made having one or more porous layers. An alloy may include any suitable combination of metals and sometimes a combination of metal and non-metal. In some embodiments, one or more of the most electrochemically active component(s) of an alloy are removed by the dissolving (or “dealloying”) process, to leave a porous matrix behind. The porous matrix layer may then be infused with one or more therapeutic agents for enhancing treatment of a patient.
REFERENCES:
patent: 2021520 (1935-11-01), Reichmann
patent: 3190749 (1965-06-01), Fleming
patent: 3338805 (1967-08-01), Pochily et al.
patent: 3923969 (1975-12-01), Baukal et al.
patent: 3948254 (1976-04-01), Zaffaroni
patent: 3993072 (1976-11-01), Zaffaroni
patent: 4218255 (1980-08-01), Bajpai et al.
patent: 4459252 (1984-07-01), MacGregor
patent: 4977038 (1990-12-01), Sieradzki et al.
patent: 5246689 (1993-09-01), Beck et al.
patent: 5340614 (1994-08-01), Perman et al.
patent: 5508060 (1996-04-01), Perman et al.
patent: 5569198 (1996-10-01), Racchini
patent: 5769884 (1998-06-01), Solovay
patent: 5843172 (1998-12-01), Yan
patent: 5843289 (1998-12-01), Lee et al.
patent: 5947893 (1999-09-01), Agrawal et al.
patent: 5972027 (1999-10-01), Johnson
patent: 5980551 (1999-11-01), Summers et al.
patent: 5985307 (1999-11-01), Hanson et al.
patent: 6019784 (2000-02-01), Hines
patent: 6027863 (2000-02-01), Donadio, III
patent: 6093498 (2000-07-01), Baldi
patent: 6107004 (2000-08-01), Donadio, III
patent: 6183255 (2001-02-01), Oshida
patent: 6203732 (2001-03-01), Clubb et al.
patent: 6240616 (2001-06-01), Yan
patent: 6273913 (2001-08-01), Wright et al.
patent: 6379381 (2002-04-01), Hossainy et al.
patent: 6506437 (2003-01-01), Harish et al.
patent: 6527938 (2003-03-01), Bales et al.
patent: 6709379 (2004-03-01), Brandau et al.
patent: 6712845 (2004-03-01), Hossainy
patent: 6758859 (2004-07-01), Dang et al.
patent: 6797311 (2004-09-01), Loomis et al.
patent: 6805898 (2004-10-01), Wu et al.
patent: 6939376 (2005-09-01), Shulze et al.
patent: 2002/0052650 (2002-05-01), Rourke et al.
patent: 2002/0133224 (2002-09-01), Bajgar et al.
patent: 2002/0198601 (2002-12-01), Bales et al.
patent: 2003/0060873 (2003-03-01), Gertner et al.
patent: 2003/0186522 (2003-10-01), Duan et al.
patent: 2004/0000046 (2004-01-01), Stinson
patent: 2004/0005723 (2004-01-01), Empedocles et al.
patent: 2004/0026684 (2004-02-01), Empedocles
patent: 2004/0039438 (2004-02-01), Alt
patent: 2004/0073298 (2004-04-01), Hossainy
patent: 2004/0095658 (2004-05-01), Buretea et al.
patent: 2004/0118448 (2004-06-01), Scher et al.
patent: 2004/0136866 (2004-07-01), Pontis et al.
patent: 2004/0146560 (2004-07-01), Whiteford et al.
patent: 2004/0148015 (2004-07-01), Lye et al.
patent: 2005/0079200 (2005-04-01), Rathenow et al.
patent: 2005/0106212 (2005-05-01), Gertner et al.
patent: 0 392 738 (1990-10-01), None
patent: 0 706 376 (1996-04-01), None
patent: 1 319 416 (2003-06-01), None
patent: WO 00/01322 (2000-01-01), None
patent: WO 00/25841 (2000-05-01), None
patent: WO 00/48660 (2000-08-01), None
patent: WO 03/045582 (2003-06-01), None
Forty, et al., “A Micromorphological Study of the Dissolution of Silver-Gold Alloys in Nitric Acid,” Philosophical Magazine A, 1980, vol. 42, No. 3, 295-318.
Martinez, et al., “Kinetics of the Dissolution of Pure Silver and Silver-Gold Alloys in Nitric Acid Solution,” Metallurigical Transactions B, vol. 24B, pp. 827-837 (plus cover sheet), Oct. 1993.
Li, et al., “Ductile-Brittle Transition in Random Porous Au,” Physical Review Letters, vol. 68, No. 8, pp. 1168-1171, Feb. 24, 1992.
Ateya, et al., “The Effects of Potential and Kinetic Parameters on the Formation of Passivating Nobel Metal Rich Surface Layers During the Selective Dissolution of Binary Alloys,” Corrosion Science, vol. 38, No. 8, pp. 1245-1267, 1996.
Eriebacher, et al., “Evolution of Nanoporosity in Dealloying,” Nature, vol. 410, pp. 450-452, Mar. 22, 2001.
Simmonds, et al., “The Observation of a Threshold in the De-Alloying of Sputter-Deposited PtxA11−xAlloy Thin Films,” Corrosion Science, vol. 40, No. 1, pp. 43-48, 1998.
Tulimieri, et al., “Ordering of Helium Mixtures in Porous Gold,” Phys. Rev. Lett., vol. 82, No. 1, pp. 121-124, Jan. 4, 1999.
Li, et al., “Synthesis of Porous Ni-Ti Shape-Memory Alloys by Self-Propagating High-Termperature Synthesis: Reaction Mechanism and Anisotropy in Pore Structure,” Acta Mater., 48 pp. 3895-3904, 2000.
Pugh, et al., “Formation of Nanoporous Platinum by Selective Dissolution of Cu from Cu0.75Pt0.25,” J. Mater. Res., vol. 18, No. 1, Jan. 2003.
Newman, et al., “Alloy Corrosion,” MRS Bulletin 74 (7), Jul. 24, 1999.
M. Grimwade, “The Surface Enrichment of Carat Gold Alloys—Depletion Gilding,” Gold Technology, Issue 26, pp. 16-23, Jul. 1999.
Gertner, et al., “Drug Delivery from Electrochemically Deposited Thin Metal Films,” Electrochemical and Solid-State Letters, 6 (4), pp. J4-J6, 2003.
Stein, et al., “Dealloying Studies with Electrodeposited Zinc-Nickel Alloy Films,” Electrochimica Acta, vol. 43, Nos. 1-2, pp. 223-226, 1998.
Schroers, et al., “Amorphous Metallic Foam,” Applied Physics Letters, vol. 82, No. 3. pp. 370-372, Jan. 20, 2003.
Wieneke, et al., “Synergistic Effects of a Novel Nanoporous Stent Coating and Tacrolimus on Intima Proliferation in Rabbbits,” Catheterization and Cardiovascular Interventions, 60:pp. 399-407, 2003.
Ji, et al., “Fabrication of Nanoporous Gold Nanowires,” Applied Physics Letters, vol. 81, No. 23, pp. 4437-4439. Dec. 2, 2002.
Kazeminezhad, et al., “Alloys by Precision Electrodeposition,” Applied Physics Letters, vol. 78, No. 7, pp. 1014-1016, Feb. 12, 2001.
Sieradzki, et al., “The Dealloying Critical Potential,” Journal of The Electrochemical Society, 149 (8), pp. B370-B377, 2002.
Itokazu, et al., “Local Drug Delivery System Using Ceramics: Vacuum Method for Impregnating a Chemoterapeutic Agent into a Porous Hydroxyapatite Block,” Journal of Material Science: Materials of Medicine, vol. 10, No. 4, pp. 249-252, Apr. 1999.
Translation of Korean Office Action dated Aug. 29, 2006.
Looi Kareen
Lye Whye-Kei
Reed Michael L.
Isabella David J.
Knobbe Martens Olson & Bear LLP
University of Virgina
LandOfFree
Medical devices having porous layers and methods for making... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Medical devices having porous layers and methods for making..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medical devices having porous layers and methods for making... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3830800