US2933729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibrator circuit
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1956-06-15
•
Granted: 1960-04-19
•
Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Mcelroy George Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:26
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2421747A
Cited
US2588114A
Cited
US2576346A
Cited
US2702899A
Cited
US2685687A
Cited
US2773255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |