Patent US1612120A successfully refreshed from Google Patents.
US3207814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonate-polyester copolymer resinous compositions
Assignee: General Electric Co
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Filing: 1961-01-03
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Granted: 1965-09-21
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A LINEAR, RANDOM-BLOCK CARBONATE COPOLYMER OF (1) A DIHYDRIC PHENOL, (2) A DIFUNCTIONAL CARBOXYLIC ACID IN WHICH THE SECOND FUNCTIONAL GROUP IS SELECTED FROM THE CLASS CONSISTING OF A CARBOXYL GROUP AND A HYDROXYL GROUP, (3) A HYDROXYL-TERMINATED POLYESTER OF A DICARBOXYLIC ACID AND A GLYCOL, AND (4) CARBONIC ACID.
Claim 2
Dependent Claim
50 words
A LINEAR, RANDOM-BLOCK CARBONATE COPOLYMER OF (1) A DIHYDRIC PHENOL, (2) A DIFUNCTIONAL CARBOXYLIC ACID IN WHICH THE SECOND FUNCTIONAL GROUP IS SELECTED FROM THE CLASS CONSISTING OF A CARBOXYL GROUP AND A HYDROXYL GROUP, (3) A HYDROXYL-TERMINATED POLYESTER OF A DICARBOXYLIC ACID AND A GLYCOL, AND (4) 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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |