US3233180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency comparator
Assignee: Bowser Inc
•
Filing: 1961-12-13
•
Granted: 1966-02-01
•
Expires: 1981-12-13
Abstract
No abstract record available.
Inventors
- 👤 Richard D Eddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
G; G01; G01R; G01R25/00; G01R25/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A CIRCUIT FOR DETECTING THE DIFFERENCE IN FREQUENCY OF TWO PULSE TRAINS COMPRISING, IN COMBINATION; INPUT MEANS FOR EACH PULSE TRAIN, MONOSTABLE MEANS OPERABLY CONNECTED TO SAID INPUT MEANS FOR PROVIDING A RECTANGULAR PULSE FOR EACH PULSE IN EACH PULSE TRAIN; DIFFERENTIATING MEANS FOR PROVIDING A PULSE SIGNAL WHEN EACH RECTANGULAR PULSE CEASES; OUTPUT MEANS RESPONSIVE TO EACH PULSE SIGNAL WHEN ENABLED FOR PROVIDING AN OUTPUT SIGNAL; FLIP-FLOP MEANS FOR ENABLING SAID OUTPUT MEANS IN ACCORD-
Claim 2
Dependent Claim
76 words
A CIRCUIT FOR DETECTING THE DIFFERENCE IN FREQUENCY OF TWO PULSE TRAINS COMPRISING, IN COMBINATION; INPUT MEANS FOR EACH PULSE TRAIN, MONOSTABLE MEANS OPERABLY CONNECTED TO SAID INPUT MEANS FOR PROVIDING A RECTANGULAR PULSE FOR EACH PULSE IN EACH PULSE TRAIN; DIFFERENTIATING MEANS FOR PROVIDING A PULSE SIGNAL WHEN EACH RECTANGULAR PULSE CEASES; OUTPUT MEANS RESPONSIVE TO EACH PULSE SIGNAL WHEN ENABLED FOR PROVIDING AN OUTPUT SIGNAL; FLIP-FLOP MEANS FOR ENABLING SAID OUTPUT MEANS IN ACCORD-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |