US3269986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear resinous polycarbonates of dihydroxy polysulfones
Assignee: General Electric Co
•
Filing: 1956-10-04
•
Granted: 1966-08-30
•
Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:50
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A HIGH MOLECULAR WEIGHT, LINEAR, RESINOUS POLYCARBONATE OF (1) A DIHYDROXY POLYSULFONE SELECTED FROM THE CLASS CONSISTING OF BIS-(4-HYDROXYPHENY)BEPHENYL DISULFONE AND P,P''-DIHYDROXYTRIPHENYL DISULONE, AND (2) CARBONIC ACID.
Claim 2
Dependent Claim
27 words
A HIGH MOLECULAR WEIGHT, LINEAR, RESINOUS POLYCARBONATE OF (1) A DIHYDROXY POLYSULFONE SELECTED FROM THE CLASS CONSISTING OF BIS-(4-HYDROXYPHENY)BEPHENYL DISULFONE AND P,P''-DIHYDROXYTRIPHENYL DISULONE, AND (2) CARBONIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |