Patent US3265770A successfully refreshed from Google Patents.
US3265770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butyl rubber-polyethylene compositions
Assignee: Polysar Ltd
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Filing: 1963-03-12
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Granted: 1966-08-09
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Expires: 1983-03-12
Abstract
No abstract record available.
Inventors
- 👤 Edwards Douglas Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS COMPRISING BLENDING 40-60 PARTS BY WEIGHT OF A RUBBERY COPOLYMER OF 80-99.9 WEIGHT PERENT ISOBUTYLENE AND 0.1-20 WEIGHT PERCENT OF AT LEAST ONE C4C14 DIOLEFINIC HYDROCARBON WITH 60-40 PARTS BY WEIGHT OF A SOLID POLYETHYLENE AND 0.1-10 PARTS WEIGHT OF AN ORGANIC PEROXIDE PER 100 PARTS BY WEIGH OF TOTAL POLMERS, AT A TEMPERATURE SUFFICIENTLY ELEVATED TO OBTAIN A HOMOGENEOUS BLENDING OF THE COMPONENTS WITH LESS THAN 50% PEROXIDE DECOMPOSITION; ELEVATING IN TEMPERATURE AND MASTICATING THE BLEND UNTIL MORE THAN 50% OF THE REMAINING UNDECOMPOSED PEROXIDE ID DECOMPOSED; LOWERING THE TEMPERAURE TO A POINT WHERE VULCANIZATION OF THE RUBBERY ISOBUTYLENE-DIOLEFINIC HYDROCARBON COPOLYMER IS SUBSTANTIALLY NEGLIGIBLE; MIXING INTO THE 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
132 words
A PROCESS COMPRISING BLENDING 40-60 PARTS BY WEIGHT OF A RUBBERY COPOLYMER OF 80-99.9 WEIGHT PERENT ISOBUTYLENE AND 0.1-20 WEIGHT PERCENT OF AT LEAST ONE C4C14 DIOLEFINIC HYDROCARBON WITH 60-40 PARTS BY WEIGHT OF A SOLID POLYETHYLENE AND 0.1-10 PARTS WEIGHT OF AN ORGANIC PEROXIDE PER 100 PARTS BY WEIGH OF TOTAL POLMERS, AT A TEMPERATURE SUFFICIENTLY ELEVATED TO OBTAIN A HOMOGENEOUS BLENDING OF THE COMPONENTS WITH LESS THAN 50% PEROXIDE DECOMPOSITION; ELEVATING IN TEMPERATURE AND MASTICATING THE BLEND UNTIL MORE THAN 50% OF THE REMAINING UNDECOMPOSED PEROXIDE ID DECOMPOSED; LOWERING THE TEMPERAURE TO A POINT WHERE VULCANIZATION OF THE RUBBERY ISOBUTYLENE-DIOLEFINIC HYDROCARBON COPOLYMER IS SUBSTANTIALLY NEGLIGIBLE; MIXING INTO THE 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)
US3136739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |