Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Reexamination Certificate
2005-12-20
2005-12-20
Morris, Terrel (Department: 1771)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
C181S292000, C181S293000, C181S294000
Reexamination Certificate
active
06977109
ABSTRACT:
Microperforated polymeric films and sound absorbers using such films are provided. The microperforated polymeric films may be relatively thin and flexible and may further include holes having a narrowest diameter less than the film thickness and a widest diameter greater than the narrowest diameter. The microperforated polymeric films of a sound absorber may also have relatively large free span portions, which, in certain embodiments, may vibrate in response to incident sound waves.
REFERENCES:
patent: 2002510 (1935-05-01), Rosenblatt
patent: 3177970 (1965-04-01), Boschi
patent: 3180448 (1965-04-01), Gary et al.
patent: 3560601 (1971-02-01), Johnson et al.
patent: 3621934 (1971-11-01), Thrasher
patent: 3770560 (1973-11-01), Elder et al.
patent: 3782495 (1974-01-01), Nassof
patent: 3834487 (1974-09-01), Hale
patent: 3887031 (1975-06-01), Wirt
patent: 3929135 (1975-12-01), Thompson
patent: 4097633 (1978-06-01), Focht
patent: 4287962 (1981-09-01), Ingard et al.
patent: 5298694 (1994-03-01), Thompson et al.
patent: 5459291 (1995-10-01), Haines et al.
patent: 5560967 (1996-10-01), Isaksen
patent: 5653836 (1997-08-01), Mnich et al.
patent: 5670758 (1997-09-01), Borchers et al.
patent: 5700527 (1997-12-01), Fuchs et al.
patent: 5962107 (1999-10-01), Lowery et al.
patent: 6139674 (2000-10-01), Markham et al.
patent: 6617002 (2003-09-01), Wood
patent: 0 441 759 (1991-02-01), None
patent: 0 816 583 (1997-02-01), None
patent: 1116181 (1966-03-01), None
patent: 2361718 (2001-10-01), None
Ingard, K.U., “Acoustic Visco-Thermal Effects”,Notes on Sound Absorption Technology, Chapter 2, pp. 2-1-2-35 (©1994).
Ingard, K.U., “Notes on Sound Absorption Technology”, E-37 (©1994).
Maa, D.Y., “Microperforated-Panel Wideband Absorbers”,Noise Control Eng. J., 29(3), pp. 77-84 (Nov.-Dec. 1987).
Wu, M.Q., “Micro-Perforated Panels for Duct Silencing”,Noise Control Eng. J., 45(2), pp. 69-77 (Mar.-Apr. 1997).
3M Innovative Properties Company
Buckingham Stephen W.
Chang Victor
Morris Terrel
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