US2499501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose derivatives
Assignee: Akzo Nobel UK PLC
•
Filing: 1945-10-05
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Granted: 1950-03-07
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Expires: 1965-10-05
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Hollihan
- 👤 Jr Sanford A Moss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:18
CPC Classifications
C; C08; C08B; C08B16/00; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C08B11/155; D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; Y; Y10; Y10S; Y10S8/00; Y10S8/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1188376A
Cited
US2201663A
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US2265918A
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US2114915A
Cited
US2302077A
Cited
US2332049A
Cited
US2390032A
Cited
US2375847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |