Patent US2548503A successfully refreshed from Google Patents.
US2548503A
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US
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Method of preventing gelation during heating of resinous isoolefin polymers
Assignee: Standard Oil Development Co
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Filing: 1946-08-01
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Granted: 1951-04-10
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Expires: 1966-08-01
Abstract
No abstract record available.
Inventors
- 👤 William J Sparks
- 👤 David W Young
- 👤 John D Garber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:53
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04; C08L; C08L9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2039363A
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US1982708A
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US2092295A
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US2223086A
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US2151382A
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US2389693A
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US2284804A
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US2333676A
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US2403966A
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US2476000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |