Patent US3169121A successfully refreshed from Google Patents.
US3169121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonate-carboxylate copolyesters of dihydric phenols and difunctional carboxylic acids
Assignee: General Electric Co
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Filing: 1957-08-22
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Granted: 1965-02-09
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Expires: 1977-08-22
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:25
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64; C08G63/02; C08G63/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A HIGH MOLECULAR WEIGHT, RESINOUS, POLYMERIC COPOLYESTER OF A DIHYDRIC PHENOL, A DICARBOXYLIC ACID AND CARBONIC ACID.
Claim 2
Dependent Claim
17 words
A HIGH MOLECULAR WEIGHT, RESINOUS, POLYMERIC COPOLYESTER OF A DIHYDRIC PHENOL, A DICARBOXYLIC ACID AND CARBONIC ACID.
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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |