Patent US3143659A successfully refreshed from Google Patents.
US3143659A
Expired / Lapsed
US
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Circuits for producing ramp waveforms
Assignee: AT&T Inc
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Filing: 1959-11-06
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Granted: 1964-08-04
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Expires: 1979-11-06
Abstract
No abstract record available.
Inventors
- 👤 John W Padalino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/10; H03K4/12; H03K4/20; H03K4/48; H03K4/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A COMBINATION COMPRISING A CAPACITOR FOR STORING A PREDETERMINED AMOUNT OF ENERGY, CONTROLLABLE MEANS FOR CHANGING THE ENERGY IN SAID CAPACITOR TO CHANGE THE VOLTAGE ACROSS SAID CAPACITOR, MEANS FOR PRODUCING A SIGNAL PROPORTIONATE TO THE RATE OF CHANGE OF VOLTAGE ACROSS SAID CAPACITOR, MEANS FOR APPLYING BOTH SAID SIGNAL AND AN INPUT SIGNAL TO SAID CONTROLLABLE MEANS, AND MEANS FOR PLACING SAID PREDETERMINED AMOUNT OF ENERGY IN SAID CAPACITOR WHENEVER SAID CONTROLLABLE MEANS IS SUBSTANTIALLY NOT CHANGING THE ENERGY IN SAID CAPACITOR.
Claim 2
Dependent Claim
83 words
A COMBINATION COMPRISING A CAPACITOR FOR STORING A PREDETERMINED AMOUNT OF ENERGY, CONTROLLABLE MEANS FOR CHANGING THE ENERGY IN SAID CAPACITOR TO CHANGE THE VOLTAGE ACROSS SAID CAPACITOR, MEANS FOR PRODUCING A SIGNAL PROPORTIONATE TO THE RATE OF CHANGE OF VOLTAGE ACROSS SAID CAPACITOR, MEANS FOR APPLYING BOTH SAID SIGNAL AND AN INPUT SIGNAL TO SAID CONTROLLABLE MEANS, AND MEANS FOR PLACING SAID PREDETERMINED AMOUNT OF ENERGY IN SAID CAPACITOR WHENEVER SAID CONTROLLABLE MEANS IS SUBSTANTIALLY NOT CHANGING THE ENERGY IN SAID CAPACITOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |