Patent US2588993A successfully refreshed from Google Patents.
US2588993A
Expired / Lapsed
US
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Semihard rubber composition and platen cover thereof
Assignee: Goodrich Corp
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Filing: 1949-04-16
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Granted: 1952-03-11
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Expires: 1969-04-16
Abstract
No abstract record available.
Inventors
- 👤 Charles H Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:27
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A SEMI-HARD VULCANIZED COMPOSITION COMPRISING A HOMOGENEOUS BLEND OF 100 PARTS BY WEIGHT OF A SULFUR-VULCANIZABLE ELASTOMERIC MATERIAL CAPABLE OF VULCANIZATION TO A HARD VULCANIZATE, AND FROM 15 TO 75 PARTS BY WEIGHT OF AA RUBBERY COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON ATOMS WITH A MINOR PROPORTION OF A CONJUGATED DIOLEFIN HAVING FROM 4 TO 8 CARBON ATOMS, WHICH COPOLYMER IS CAPABLE OF VULCANIZATION ONLY TO A SOFT VULCANIZATE IN THE PRESENCE OF 8 TO 30 PART BY WEIGHTT OF SULFUR, VULCANIZED IN THE PRESENCE OF 8 TO 30 PARTS BY WEIGHT OF SULFUR.
Claim 2
Dependent Claim
102 words
A SEMI-HARD VULCANIZED COMPOSITION COMPRISING A HOMOGENEOUS BLEND OF 100 PARTS BY WEIGHT OF A SULFUR-VULCANIZABLE ELASTOMERIC MATERIAL CAPABLE OF VULCANIZATION TO A HARD VULCANIZATE, AND FROM 15 TO 75 PARTS BY WEIGHT OF AA RUBBERY COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON ATOMS WITH A MINOR PROPORTION OF A CONJUGATED DIOLEFIN HAVING FROM 4 TO 8 CARBON ATOMS, WHICH COPOLYMER IS CAPABLE OF VULCANIZATION ONLY TO A SOFT VULCANIZATE IN THE PRESENCE OF 8 TO 30 PART BY WEIGHTT OF SULFUR, VULCANIZED IN THE PRESENCE OF 8 TO 30 PARTS BY WEIGHT OF SULFUR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |