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US2817230A
Expired / Lapsed
US
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Leak testing device
Assignee: Individual
•
Filing: 1954-10-18
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Granted: 1957-12-24
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Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Wilfred D Mccully
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:02
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2853; G01M3/2861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1788845A
Cited
US1931502A
Cited
US2383455A
Cited
US2571236A
Cited
US2633015A
Cited
FR1050021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |