US2458841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber softened with sulfur dioxide and chlorine treated polyisobutylene reacted with ammonia
Assignee: Standard Oil Development Co
•
Filing: 1944-09-20
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Granted: 1949-01-11
•
Expires: 1964-09-20
Abstract
No abstract record available.
Inventors
- 👤 Norman M Elmore
- 👤 Albert M Gessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:26
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152828A
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US2259671A
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US2202791A
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US2334186A
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US2234215A
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US2212786A
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GB542414A
Cited
US2351735A
Cited
US2325947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |