US2621306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-delay circuit
Assignee: Individual
•
Filing: 1943-08-03
•
Granted: 1952-12-09
•
Expires: 1963-08-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Varela
- 👤 Jr Robert A Herring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:08
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/26; 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)
US1936789A
Cited
US2293135A
Cited
US2405238A
Cited
US2368449A
Cited
US2434894A
Cited
US2338512A
Cited
US2448363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |