US2960495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers containing polysulfide and spirobi (meta-dioxane) groups
Assignee: Union Carbide Corp
•
Filing: 1957-07-16
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Granted: 1960-11-15
•
Expires: 1977-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Stansbury
- 👤 Howard R Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C08G75/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE CLASS OF POLYMERS CONSISTING ESSENTIALLY OF STRUCTURES REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
12 words
THE CLASS OF POLYMERS CONSISTING ESSENTIALLY OF STRUCTURES REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
DE858406C
Cited
US2495145A
Cited
US2532369A
Cited
US2700658A
Cited
US2716636A
Cited
US2787608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |