Patent US2575871A successfully refreshed from Google Patents.
US2575871A
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US
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Granular smokeless propellant powders
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-09-24
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Granted: 1951-11-20
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Expires: 1967-09-24
Abstract
No abstract record available.
Inventors
- 👤 Gordon Stuart
- 👤 Whitworth Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:57
CPC Classifications
A; A45; A45C; A45C13/00; A45C13/02; A45C13/03; C; C01; C01C; C01C1/00; C01C1/18; C05; C05C; C05C1/00; C05C1/02; C06; C06B; C06B21/00; C06B21/0033; C06B21/0066; C06B23/00; C06B23/002; C06B45/00; F; F42; F42B; F42B5/00; F42B5/02; F42B5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US751385A
Cited
GB189417994A
Cited
US726901A
Cited
US677527A
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US802347A
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US899577A
Cited
US1077320A
Cited
US2261630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |