Patent US2423446A successfully refreshed from Google Patents.
US2423446A
Expired / Lapsed
US
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Apparatus for controlling gun chargers
Assignee: Specialties Development Corp
•
Filing: 1942-08-14
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Granted: 1947-07-08
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Expires: 1962-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry C Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
F; F41; F41A; F41A7/00; F41A7/02; F41A7/04
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |