Patent US2426997A successfully refreshed from Google Patents.
US2426997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projectile
Assignee: Individual
•
Filing: 1941-03-10
•
Granted: 1947-09-09
•
Expires: 1961-03-10
Abstract
No abstract record available.
Inventors
- 👤 John C Gray
- 👤 Wilfred E Thibodeau
- 👤 Joseph H Church
- 👤 Gregory J Kessenich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:51
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/04; F42B12/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US93754A
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US124397A
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US399877A
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GB190314827A
Cited
GB191128030A
Cited
GB191509320A
Cited
FR504857A
Cited
US1380773A
Cited
US1366555A
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DE426982C
Cited
US1903348A
Cited
US2269475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-08 | 1951-03-10 | 1951-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-08 | 1955-03-10 | 1955-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-08 | 1959-03-10 | 1959-09-09 | $7700.00 | Window Closed / Lapsed |