US2485335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer separation
Assignee: Standard Oil Development Co
•
Filing: 1944-12-30
•
Granted: 1949-10-18
•
Expires: 1964-12-30
Abstract
No abstract record available.
Inventors
- 👤 Charles W Tyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/24; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2141177A
Cited
US2054075A
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US2109130A
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GB513521A
Cited
US2300283A
Cited
US2372575A
Cited
US2292608A
Cited
US2378138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |