US2472973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure testing apparatus and control circuits therefor
Assignee: Federal Cartridge Corp
•
Filing: 1944-01-20
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Granted: 1949-06-14
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Expires: 1964-01-20
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Harry William
- 👤 Grover H Helmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/32; G01M3/3236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1429949A
Cited
US1850208A
Cited
US1884942A
Cited
US2232711A
Cited
US2268124A
Cited
US2226325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |