Patent US2482011A successfully refreshed from Google Patents.
US2482011A
Expired / Lapsed
US
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Production of cellulose ethers
Assignee: Akzo Nobel UK PLC
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Filing: 1946-02-07
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Granted: 1949-09-13
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Expires: 1966-02-07
Abstract
No abstract record available.
Inventors
- 👤 Macgregor James Hutchison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:50
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C08B11/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |