US2618624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of styrene and isobutylene polymers
Assignee: Standard Oil Development Co
•
Filing: 1949-02-15
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Granted: 1952-11-18
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Expires: 1969-02-15
Abstract
No abstract record available.
Inventors
- 👤 William J Sparks
- 👤 Luther B Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:48
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L25/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2051944A
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GB513521A
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US2213423A
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US2274749A
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US2282002A
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US2247154A
Cited
US2263213A
Cited
GB586466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |