US3316394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generalized analog differentiator
Assignee: Individual
•
Filing: 1963-12-31
•
Granted: 1967-04-25
•
Expires: 1983-12-31
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Fluhr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:21
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18; G06G7/1806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
APPARATUS FOR DIFFERENTIATING A VARIABLE SIGNAL COMPRISING: FIRST AND SECOND STORAGE DEVICES; A DIFFERENTIAL AMPLIFIER HAVING FIRST AND SECOND INPUTS AND SWITCHING MEANS WHICH ALTERNATELY CONNECT SAID VARIABLE SIGNAL TO ONE AND THEN THE OTHER OF SAID FIRST AND SECOND STORAGE DEVICES AND TO ONE INPUT OF SAID DIFFERENTIAL AMPLIFIER AND TO CONNECT THE OTHER INPUT OF SAID DIFFERENTIAL AMPLIFIER ALTERNATELY TO THE FIRST OR SECOND STORAGE DEVICE NOT CONNECTED TO SAID VARIABLE SIGNAL.
Claim 2
Dependent Claim
74 words
APPARATUS FOR DIFFERENTIATING A VARIABLE SIGNAL COMPRISING: FIRST AND SECOND STORAGE DEVICES; A DIFFERENTIAL AMPLIFIER HAVING FIRST AND SECOND INPUTS AND SWITCHING MEANS WHICH ALTERNATELY CONNECT SAID VARIABLE SIGNAL TO ONE AND THEN THE OTHER OF SAID FIRST AND SECOND STORAGE DEVICES AND TO ONE INPUT OF SAID DIFFERENTIAL AMPLIFIER AND TO CONNECT THE OTHER INPUT OF SAID DIFFERENTIAL AMPLIFIER ALTERNATELY TO THE FIRST OR SECOND STORAGE DEVICE NOT CONNECTED TO SAID VARIABLE SIGNAL.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |