Patent US2923562A successfully refreshed from Google Patents.
US2923562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch structure
Assignee: Johnston Testers Inc
•
Filing: 1955-08-02
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Granted: 1960-02-02
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Expires: 1975-08-02
Abstract
No abstract record available.
Inventors
- 👤 Edgar W Bagnell
- 👤 William K Ansite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:48
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/08; E21B17/00; E21B17/02; E21B17/04; E21B17/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1715504A
Cited
US2409811A
Cited
US2473973A
Cited
US2642297A
Cited
US2708589A
Cited
US2701615A
Cited
US2726848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |