Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Reexamination Certificate
2005-10-11
2005-10-11
Banks, Derris H. (Department: 3725)
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
C434S081000
Reexamination Certificate
active
06953345
ABSTRACT:
A water-metachromatic sheet has a support with a porous layer containing a binder resin with dispersed fine-particle silicic acid. The sheet is capable of rendering different transparency between water absorbed and unabsorbed states. The support is a cloth having a weight per unit area of 30 gm2to 1,000 gm2, the fine-particle silicic acid is contained in an amount of from 1 gm2to 30 gm2, and the fine-particle silicic acid is incorporated in an amount from 0.5 to 2 parts by weight based on 1 part by weight of the binder resin.
REFERENCES:
patent: 2740979 (1956-04-01), Bridy
patent: 3421823 (1969-01-01), Matsumoto
patent: 3463597 (1969-08-01), Wakai
patent: 3993409 (1976-11-01), Hart
patent: 4022211 (1977-05-01), Timmons et al.
patent: 4028118 (1977-06-01), Nakasuji et al.
patent: 4065215 (1977-12-01), Otsuka
patent: 4212393 (1980-07-01), Lenkoff
patent: 4681791 (1987-07-01), Shibahashi et al.
patent: 4810562 (1989-03-01), Okawa et al.
patent: 5011445 (1991-04-01), Nakasuji et al.
patent: 5163846 (1992-11-01), Lee
patent: 5219625 (1993-06-01), Matsunami et al.
patent: 5451114 (1995-09-01), Ishigaki
patent: 5641078 (1997-06-01), Kaufmann
patent: 5814579 (1998-09-01), Dotson et al.
patent: 5858914 (1999-01-01), Shibahashi et al.
patent: 5865553 (1999-02-01), Flye Sainte Marie et al.
patent: 5906446 (1999-05-01), McCulloch et al.
patent: 5958525 (1999-09-01), Green et al.
patent: 6228804 (2001-05-01), Nakashima
patent: 6244774 (2001-06-01), Barosso et al.
patent: 6263602 (2001-07-01), Seiber et al.
patent: 6364993 (2002-04-01), Netsch et al.
patent: 6416853 (2002-07-01), Nakashima et al.
patent: 0 776 645 (1997-06-01), None
patent: 0 919 604 (1999-06-01), None
patent: 02-074688 (1990-03-01), None
Kani Takao
Nakashima Akio
Banks Derris H.
Suhol Dmitry
The Pilot Ink Co., Ltd.
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