US2695328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Softening of rubber
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1951-06-30
•
Granted: 1954-11-23
•
Expires: 1971-06-30
Abstract
No abstract record available.
Inventors
- 👤 Kendall Charles Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR SOFTENING UNVULCANIZED RUBBER COMPRISING TREATING THE RUBBER WITH A PER-COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDE, HYDROGEN PEROXIDE AND WATER SOLUBLE PER-SULPHATE IN THE PRESENCE OF A DEPOLYMERIZATION PROMOTER WHICH IS A SULPHUR-CONTAINING COMPOUND CONTAINING THE GROUP
Claim 2
Dependent Claim
42 words
A PROCESS FOR SOFTENING UNVULCANIZED RUBBER COMPRISING TREATING THE RUBBER WITH A PER-COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDE, HYDROGEN PEROXIDE AND WATER SOLUBLE PER-SULPHATE IN THE PRESENCE OF A DEPOLYMERIZATION PROMOTER WHICH IS A SULPHUR-CONTAINING COMPOUND CONTAINING THE GROUP
References Cited (Backward Citations)
US1490073A
Cited
US2064580A
Cited
US2190587A
Cited
US2206448A
Cited
US2332401A
Cited
GB637594A
Cited
GB637604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |