US2190777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition mixture
Assignee: Hercules Powder Co
•
Filing: 1939-01-21
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Granted: 1940-02-20
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Expires: 1959-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Horace I Etchells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
C; C06; C06B; C06B31/00; C06B31/02; C06B31/12; C06B31/14; C06B31/18; C06B25/00; C06B25/04; C06B31/22; C06B31/24; C06B31/26; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/111; Y10S149/112; Y10S149/113
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) | 1943-02-19 | 1943-08-21 | 1944-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-19 | 1947-08-21 | 1948-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-19 | 1951-08-21 | 1952-02-20 | $7700.00 | Window Closed / Lapsed |