US2903437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing composition comprising a mixture of brominated butyl rubber, polyisobutylene and carbon black, and method of making same
Assignee: EIDP Inc
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Filing: 1956-08-27
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Granted: 1959-09-08
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Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 James E Van Epp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:20
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C09J123/22; C09J123/26; C09J123/28; C09J123/283; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A SEALING COMPOSITION CONSISTING ESSENTIALLY OF ABOUT FROM 10 TO 90 PARTS BY WEIGHT OF BROMINATED RUBBER AND APPROXIMATELY 90 TO 10 PARTS BY WEIGHT OF POLYISOBUTYLENE FOR A TOTAL OF 100 PARTS BY WEIGHT ABOUT FROM 50 TO 100 PARTS BY WEIGHT OF INERT CARBON SELECTED FROM THE GROUP CONSISTING OF AMORPHOUS AND ACTIVATED CARBON, AND CURATIVES IN AN AMOUNT SUFFICIENT TO CURE SAID BROMINATED RUBBER, SAID BROMINATED RUBBER COMPRISING A COPOLYMER OF ABOUT FROM 70 TO 99 PARTS BY WEIGHT OF ISOBUTYLENE AND ABOUT FROM 30 TO 1 PARTS BY WEIGHT OF ISOPRENE AND CONTAINING ABOUT FROM 0.5 TO 50% BY WEIGHT OF COMBINED BROMINE.
Claim 2
Dependent Claim
107 words
A SEALING COMPOSITION CONSISTING ESSENTIALLY OF ABOUT FROM 10 TO 90 PARTS BY WEIGHT OF BROMINATED RUBBER AND APPROXIMATELY 90 TO 10 PARTS BY WEIGHT OF POLYISOBUTYLENE FOR A TOTAL OF 100 PARTS BY WEIGHT ABOUT FROM 50 TO 100 PARTS BY WEIGHT OF INERT CARBON SELECTED FROM THE GROUP CONSISTING OF AMORPHOUS AND ACTIVATED CARBON, AND CURATIVES IN AN AMOUNT SUFFICIENT TO CURE SAID BROMINATED RUBBER, SAID BROMINATED RUBBER COMPRISING A COPOLYMER OF ABOUT FROM 70 TO 99 PARTS BY WEIGHT OF ISOBUTYLENE AND ABOUT FROM 30 TO 1 PARTS BY WEIGHT OF ISOPRENE AND CONTAINING ABOUT FROM 0.5 TO 50% BY WEIGHT OF COMBINED BROMINE.
References Cited (Backward Citations)
US2631984A
Cited
US2765018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |