Patent US2767156A successfully refreshed from Google Patents.
US2767156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of synthetic rubber with methylene derivatives of dihydric phenols
Assignee: Uniroyal Inc
•
Filing: 1952-03-11
•
Granted: 1956-10-16
•
Expires: 1972-03-11
Abstract
No abstract record available.
Inventors
- 👤 Pliny O Tawney
- 👤 Julian R Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/04; C08K5/06; C08K5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF VULCANIZING SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYYMERS OF ALIPHATIC CONJUGATED DIOLEFINS AND COPOLYMERS OF AN ALIPHATIC CONJUGATED DIOLEFIN WITH A MONOETHYLENICALLY UNSATURATED MONOMER CONTAINING A SINGLE TERMINAL VINYLIDENE GROUP COPOLYMERIZABLE WITH SAID DIOLEFIN TO FORM RUBBERY COPOLYMER WHICH COPOLYMERS CONTAINED COPOLYMERIZED THEREIN AT LEAST 25% OF SAID ALIPHATIC CONJUGATED DIOLEFIN, WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM 150* TO 250* C., A MIXTURE OF SAID RUBBER, CARBON BLACK IN AN AMOUNT EQUAL TO AT LEAST 15 PARTS PER HUNDRED PARTS OF SAID RUBBER, AND A VULCANIZING AGENT HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 2
Independent Claim
99 words
THE METHOD OF VULCANIZING SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYYMERS OF ALIPHATIC CONJUGATED DIOLEFINS AND COPOLYMERS OF AN ALIPHATIC CONJUGATED DIOLEFIN WITH A MONOETHYLENICALLY UNSATURATED MONOMER CONTAINING A SINGLE TERMINAL VINYLIDENE GROUP COPOLYMERIZABLE WITH SAID DIOLEFIN TO FORM RUBBERY COPOLYMER WHICH COPOLYMERS CONTAINED COPOLYMERIZED THEREIN AT LEAST 25% OF SAID ALIPHATIC CONJUGATED DIOLEFIN, WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM 150* TO 250* C., A MIXTURE OF SAID RUBBER, CARBON BLACK IN AN AMOUNT EQUAL TO AT LEAST 15 PARTS PER HUNDRED PARTS OF SAID RUBBER, AND A VULCANIZING AGENT HAVING THE FOLLOWING STRUCTURAL FORMULA
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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |