US2676948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing catalyst for polysiloxane resins
Assignee: Westinghouse Electric Corp
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Filing: 1952-10-21
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Granted: 1954-04-27
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Expires: 1972-10-21
Abstract
No abstract record available.
Inventors
- 👤 Robert D Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:47
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/58; C08G77/04; C08G77/14; C08G77/16; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08L; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A COMPOSITION OF MATTER COMPRISING A HEATHARDENABLE ORGANOPOLYSILOXANE RESIN CONTAINING AN AVERAGE OF MORE THAN 1 AND LESS THAN 2 ORGANIC GROUPS PER SILICON ATOM, THE ORGANIC GROUPS BEING ATTACHED TO THE SILICON ATOMS OF THE ORGANOPOLYSILOXANE BY CARBON-SILICON LINKAGES, AND A CURING CATALYST FOR SAID RESIN COMPRISING FROM 0.1% TO 1.2% BY WEIGHT OF A MIXTURE OF FROM 6 TO 12 PARTS BY WEIGHT OF GUANIDINE CARBONATE, 6 TO 12 PARTS BY WEIGHT OF A METAL SALT OF AN ORGANIC CARBOXYLIC ACID SOLUBLE IN SAID RESIN AND 2 TO 6 PARTS BY WEIGHT OF ACETIC ANHYDRIDE.
Claim 2
Dependent Claim
97 words
A COMPOSITION OF MATTER COMPRISING A HEATHARDENABLE ORGANOPOLYSILOXANE RESIN CONTAINING AN AVERAGE OF MORE THAN 1 AND LESS THAN 2 ORGANIC GROUPS PER SILICON ATOM, THE ORGANIC GROUPS BEING ATTACHED TO THE SILICON ATOMS OF THE ORGANOPOLYSILOXANE BY CARBON-SILICON LINKAGES, AND A CURING CATALYST FOR SAID RESIN COMPRISING FROM 0.1% TO 1.2% BY WEIGHT OF A MIXTURE OF FROM 6 TO 12 PARTS BY WEIGHT OF GUANIDINE CARBONATE, 6 TO 12 PARTS BY WEIGHT OF A METAL SALT OF AN ORGANIC CARBOXYLIC ACID SOLUBLE IN SAID RESIN AND 2 TO 6 PARTS BY WEIGHT OF ACETIC ANHYDRIDE.
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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |