US3219913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic maintenance circuit
Assignee: Individual
•
Filing: 1963-05-17
•
Granted: 1965-11-23
•
Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Brown Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:25
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/542
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
AN AUTOMATIC MAINTENANCE CIRCUIT COMPRISING: A CIRCUIT HAVING A PLURALITY OF AMPLIFIER SECTIONS WHICH ARE TO BE MAINTAINED; A STANDBY AMPLIFIER CROSS CONNECTED IN A BISTABLE SWITCHING ARRANGEMENT WITH EACH OF SAID AMPLIFIER SECTIONS, WHEREBY WHEN ONE OF SAID AMPLIFIER SECTIONS FAILS IN OPERATION SAID STANDBY AMPLIFIER IS AUTMATICALLY SWITCHED TO AN OPERATIONAL AMPLIFIER REPLACING THE AMPLIFIER THAT HAS FAILED.
References Cited (Backward Citations)
US2330582A
Cited
US2624038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |