US2544685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing device
Assignee: Individual
•
Filing: 1946-02-20
•
Granted: 1951-03-13
•
Expires: 1966-02-20
Abstract
No abstract record available.
Inventors
- 👤 Frank H Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:24
CPC Classifications
G; G04; G04F; G04F8/00; G04F8/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1332844A
Cited
US2044424A
Cited
US2010968A
Cited
US2212981A
Cited
GB551910A
Cited
US2408727A
Cited
US2504848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |