US2607764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable copolymers of isobutylene and 10-70 per cent combined butadiene
Assignee: Standard Oil Development Co
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Filing: 1947-11-28
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Granted: 1952-08-19
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Expires: 1967-11-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Nelson
- 👤 Welch Lester Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:05
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
A SYNTHETIC, SOLID, RUBBER-LIKE INTERPOLYMER OF 10 TO 70% COMBINED BUTADIENE AND 90 TO 30% COMBINED ISOBUTYLENE, CHARACTERIZED BY A WIJS IODINE NUMBER BETWEEN 60 AND 165, A STAUDINGER MOLECULAR WEIGHT BETWEEN 30,000 AND 100,000 AND READY VULCANIZABILITY TO A SYNTHETIC RUBBER HAVING A MODULUS OF ABOUT 1300 TO 1540 POUNDS PER SQUARE INCH AT 300% ELONGATION.
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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |