Patent US2999845A successfully refreshed from Google Patents.
US2999845A
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Copolymer containing polycarbonate and polysiloxy constituents
Assignee: General Electric Co
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Filing: 1959-01-02
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Granted: 1961-09-12
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:29
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/085; C08G77/00; C08G77/48; C08G77/60; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
THE PROCESS OF PREPARING A COPOLYMER COMPOSITION CONTAINING DIHYDRIC PHENOL DERIVED GROUPS LINKED WITH CARBONATE AND SILOXY GROUPS WHICH COMPRISES REACTING TOGETHER UNDER ESTERIFICATION CONDITONS A DIHYDRIC PHENOL, PHOSGENE AND ORGANODIHALOSILANE.
Claim 2
Dependent Claim
31 words
THE PROCESS OF PREPARING A COPOLYMER COMPOSITION CONTAINING DIHYDRIC PHENOL DERIVED GROUPS LINKED WITH CARBONATE AND SILOXY GROUPS WHICH COMPRISES REACTING TOGETHER UNDER ESTERIFICATION CONDITONS A DIHYDRIC PHENOL, PHOSGENE AND ORGANODIHALOSILANE.
References Cited (Backward Citations)
US2406549A
Cited
US2950266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |