Patent US3262997A successfully refreshed from Google Patents.
US3262997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butyl rubber-polyolefine blends
Assignee: Polysar Ltd
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Filing: 1964-04-27
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Granted: 1966-07-26
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Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 Edwards Douglas Cameron
- 👤 Walker John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS COMPRISING BLENDING 5-95 PARTS BY WEIGHT OF A SOLID HOMPOLYMER OF A C2-C5 ALPHA-MONOOLEFINE, 95-5 PARTS BY WEIGHT OF A RUBBERY COPOLYMER OF ISOBUTYLENE AND AT LEAST ONE COPOLYMERIZABLE C4-C14 DIOLEFINIC HYDROCARBON CONTAINING 80-99.9 MOLE PERCENT COPOLYMERIZED ISOBUTYLENE, AND 0.1-3.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF TOTAL POLYMERS OF A HALOMELAMINE, MASTICATING THE BLEND AT 120-200*C. FOR 1-30 MINUTES, LOWERING THE TEMPERATURE OF THE MASTICATED BLEND TO A POINT WHERE VULCANIZATION OF THE RUBBERY ISOBUTYLENE-DIOLEFINIC HYDROCARBON COPOLYMER IS SUBSTANTIALLY NEGLIGIBLE, MIXING INTO THE COOLED BLEND A VULCANIZING AGENT FOR THE RUBBERY ISOBUTYLENE-DIOLEFINIC HYDROCARBON COPOLYMER COMPONENT OF THE BLEND, AND SHAPING AND VULCANIZING THE THUS PREPARED BLEND.
Claim 2
Dependent Claim
111 words
A PROCESS COMPRISING BLENDING 5-95 PARTS BY WEIGHT OF A SOLID HOMPOLYMER OF A C2-C5 ALPHA-MONOOLEFINE, 95-5 PARTS BY WEIGHT OF A RUBBERY COPOLYMER OF ISOBUTYLENE AND AT LEAST ONE COPOLYMERIZABLE C4-C14 DIOLEFINIC HYDROCARBON CONTAINING 80-99.9 MOLE PERCENT COPOLYMERIZED ISOBUTYLENE, AND 0.1-3.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF TOTAL POLYMERS OF A HALOMELAMINE, MASTICATING THE BLEND AT 120-200*C. FOR 1-30 MINUTES, LOWERING THE TEMPERATURE OF THE MASTICATED BLEND TO A POINT WHERE VULCANIZATION OF THE RUBBERY ISOBUTYLENE-DIOLEFINIC HYDROCARBON COPOLYMER IS SUBSTANTIALLY NEGLIGIBLE, MIXING INTO THE COOLED BLEND A VULCANIZING AGENT FOR THE RUBBERY ISOBUTYLENE-DIOLEFINIC HYDROCARBON COPOLYMER COMPONENT OF THE BLEND, AND SHAPING AND VULCANIZING THE THUS PREPARED BLEND.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |