Patent DE4303882C2 successfully refreshed from Google Patents.
US2331858A
Expired / Lapsed
US
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Preparing solutions of cellulose glycollic acid salts
Assignee: Dow Chemical Co
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Filing: 1941-03-06
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Granted: 1943-10-12
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Expires: 1961-03-06
Abstract
No abstract record available.
Inventors
- 👤 Richard D Freeman
- 👤 Martin J Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/05; D06M15/09; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/10; C08B11/12; D21; D21H; D21H19/00; D21H19/10; D21H19/12; D21H19/14; D21H19/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |