US2405973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of starch ethers
Assignee: National Aeronautics and Space Administration
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Filing: 1944-01-20
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Granted: 1946-08-20
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Expires: 1964-01-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Peter L Nichols
- 👤 Robert M Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:08
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
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) | 1949-08-19 | 1950-02-18 | 1950-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-08-19 | 1954-02-18 | 1954-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-08-19 | 1958-02-18 | 1958-08-20 | $7700.00 | Window Closed / Lapsed |