Patent US2958680A successfully refreshed from Google Patents.
US2958680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloroprene polymers containing trialkyl thiourea accelerators
Assignee: Vanderbilt Chemicals LLC
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Filing: 1956-06-15
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Granted: 1960-11-01
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Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Lester A Brooks
- 👤 Jack C Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A VULCANIZABLE POLYCHLOROPRENE COMPOSITION COMPRISING AN UNVULCANIZED CHLOROPRENE POLYMER AND FROM ABOUT 0.05% TO ABOUT 5.0% OF THE WEIGHT OF THE POLYMER OF A THIOUREA ACCELERATOR HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
30 words
A VULCANIZABLE POLYCHLOROPRENE COMPOSITION COMPRISING AN UNVULCANIZED CHLOROPRENE POLYMER AND FROM ABOUT 0.05% TO ABOUT 5.0% OF THE WEIGHT OF THE POLYMER OF A THIOUREA ACCELERATOR HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2544746A
Cited
US2804447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |