Patent US2561332A successfully refreshed from Google Patents.
US2561332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Course indicator
Assignee: —
•
Filing: —
•
Granted: 1951-07-24
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Expires: 1968-07-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:44
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/02; G01D13/04; G01C; G01C17/00; G01C17/02; G01C17/04; G01C19/00; G01C19/02; G01C19/34; G01C19/36; G06; G06G; G06G1/00; G06G1/0005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1258031A
Cited
DE365242C
Cited
US1422576A
Cited
GB288412A
Cited
US1743294A
Cited
US1974220A
Cited
US2127807A
Cited
US2112516A
Cited
US2158468A
Cited
US2383468A
Cited
US2335876A
Cited
US2334116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |