Patent US4486257A successfully refreshed from Google Patents.
US4486257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive for and method for adhesion of ceramic articles
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1982-09-07
•
Granted: 1984-12-04
•
Expires: 2002-09-07
Abstract
Abstract A composition of at least one member selected from the group consisting of sodium fluoride and calcium fluoride and optionally containing kaolin is powerful adhesive for ceramic articles which is used by interposing the adhesive intimately between the opposed surfaces for union of the ceramic articles and heating the adhesive to a temperature equal to or higher than the decomposition temperature of the fluoride used.
Inventors
- 👤 Yoshihiro Ebata
- 👤 Saburo Kose
- 👤 Makoto Kinoshita
- 👤 Tsutomu Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:03
CPC Classifications
C; C09; C09J; C09J1/00; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/062; C04B2237/09; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/36; C04B2237/368; C04B2237/50; C04B2237/56; C04B2237/567
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A method for the adhesion of two ceramic articles both formed of silicon nitride, said method comprising interposing between said two ceramic articles an adhesive comprising as active components 40% to 30% by weight of calcium fluoride and 60% to 70% by weight of kaolin, and heating said adhesive to a temperature in the range of from about 1000° C. to about 1500° C. thereby allowing said adhesive to have adhesive strength of not less than 1000 kg/cm 2 .
Claim 2
Independent Claim
80 words
A method for the adhesion of two ceramic articles both formed of silicon nitride, said method comprising interposing between said two ceramic articles an adhesive comprising as active components 40% to 30% by weight of calcium fluoride and 60% to 70% by weight of kaolin, and heating said adhesive to a temperature in the range of from about 1000° C. to about 1500° C. thereby allowing said adhesive to have adhesive strength of not less than 1000 kg/cm 2 .
Claim 3
Dependent Claim
46 words
An adhesive for two ceramic articles both formed of silicon nitride, said adhesive comprising as active components 40% to 30% by weight of calcium fluoride and 60% to 70% by weight of kaolin and having an adhesive strength of not less than 1000 kg/cm 2 .
Claim 4
Dependent Claim
46 words
An adhesive for two ceramic articles both formed of silicon nitride, said adhesive comprising as active components 40% to 30% by weight of calcium fluoride and 60% to 70% by weight of kaolin and having an adhesive strength of not less than 1000 kg/cm 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |