US3133903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfone of 1, 5-cyclooctadiene
Assignee: EIDP Inc
•
Filing: 1962-03-01
•
Granted: 1964-05-19
•
Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 Frazer August Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:27
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A POLYMER HAVING AN INHERENT VISCOSITY IN DIMETHYL SULFOXIDE AT 30*C. OF AT LEAST ABOUT 0.2 CONSISTING ESSENTIALLY OF A REPEATING UNIT OF THE FORMULA: -(9,9-DI(O=)-9-THIONIABICYCLO(3.3.0)OCT-8,4-YLENE)-SO
Claim 2
Dependent Claim
26 words
A POLYMER HAVING AN INHERENT VISCOSITY IN DIMETHYL SULFOXIDE AT 30*C. OF AT LEAST ABOUT 0.2 CONSISTING ESSENTIALLY OF A REPEATING UNIT OF THE FORMULA: -(9,9-DI(O=)-9-THIONIABICYCLO(3.3.0)OCT-8,4-YLENE)-SO
References Cited (Backward Citations)
US2568656A
Cited
GB716048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |