US3843502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Promoters for radiation induced cross-linking in polymer substances
Assignee: Bridgestone Firestone Inc
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Filing: 1971-06-01
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Granted: 1974-10-22
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Expires: 1991-06-01
Abstract
Abstract 1. A PROCESS FOR THE RADIATION VULCANIZATION OF DIOLEFIN RUBBERS WHICH COMPRISES SUBJECTING AN UNVULCANIZED COMPOSITION OF SAID DIOLEFIN RUBBER IN WHICH THE AVERAGE MOLECULAR WEIGHT IS FROM ABOUT 100,000 TO 500,000 CONTAINING FROM ABOUT 0.1 TO 5% BY WEIGHT OF AN INDIRECT VULCANIZATION POLYHYDROSULFIDE DIRECT VULCANIZATION PROMOTER, AND FROM PROMOTER, SAID INDIRECT VULCANIZATION PROMOTER BEING A LOW MOLECULAR WEIGHT HALOGENATED ALIPHATIC OR AROMATIC HYDROCARBON CONTAINING UP TO ABOUT TEN CARBON ATOMS, THE PERCENT BY WEIGHT OF BOTH PROMOTERS BEING BASED ON THE TOTAL WEIGHT, TO HIGH ENERGY IONIZING RADIATION AT A TOTAL DOSE OF FROM ABOUT 0.1 TO 15 MRADS.
Inventors
- 👤 D Pearson
- 👤 A Shurpik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:18
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0877; B29K; B29K2021/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE RADIATION VULCANIZATION OF DIOLEFIN RUBBERS WHICH COMPRISES SUBJECTING AN UNVULCANIZED COMPOSITION OF SAID DIOLEFIN RUBBER IN WHICH THE AVERAGE MOLECULAR WEIGHT IS FROM ABOUT 100,000 TO 500,000 CONTAINING FROM ABOUT 0.1 TO 5% BY WEIGHT OF AN INDIRECT VULCANIZATION POLYHYDROSULFIDE DIRECT VULCANIZATION PROMOTER, AND FROM PROMOTER, SAID INDIRECT VULCANIZATION PROMOTER BEING A LOW MOLECULAR WEIGHT HALOGENATED ALIPHATIC OR AROMATIC HYDROCARBON CONTAINING UP TO ABOUT TEN CARBON ATOMS, THE PERCENT BY WEIGHT OF BOTH PROMOTERS BEING BASED ON THE TOTAL WEIGHT, TO HIGH ENERGY IONIZING RADIATION AT A TOTAL DOSE OF FROM ABOUT 0.1 TO 15 MRADS.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE RADIATION VULCANIZATION OF DIOLEFIN RUBBERS WHICH COMPRISES SUBJECTING AN UNVULCANIZED COMPOSITION OF SAID DIOLEFIN RUBBER IN WHICH THE AVERAGE MOLECULAR WEIGHT IS FROM ABOUT 100,000 TO 500,000 CONTAINING FROM ABOUT 0.1 TO 5% BY WEIGHT OF AN INDIRECT VULCANIZATION POLYHYDROSULFIDE DIRECT VULCANIZATION PROMOTER, AND FROM PROMOTER, SAID INDIRECT VULCANIZATION PROMOTER BEING A LOW MOLECULAR WEIGHT HALOGENATED ALIPHATIC OR AROMATIC HYDROCARBON CONTAINING UP TO ABOUT TEN CARBON ATOMS, THE PERCENT BY WEIGHT OF BOTH PROMOTERS BEING BASED ON THE TOTAL WEIGHT, TO HIGH ENERGY IONIZING RADIATION AT A TOTAL DOSE OF FROM ABOUT 0.1 TO 15 MRADS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |