US2820931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices and methods
Assignee: GTE Sylvania Inc
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Filing: 1953-04-27
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Granted: 1958-01-21
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Expires: 1973-04-27
Abstract
No abstract record available.
Inventors
- 👤 Koury Frederic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:56
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W76/42; H10W76/48; H10W72/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A SEMICONDUCTOR DEVICE COMPRISING A SEALED ENVELOPE, CONTACT AND SEMICONDUCTOR ELEMETS MOUNTED IN SATING DIRECT CURRENT; MEANS FOR FILTERING SAID PULSATING CURRENT TO DEVELOP A SUBSTANTIALLY CONSTANT VOLTAGE; A CAPACITOR; SERIES RESISTANCE MEANS FOR CONNECTING SAID CAPACITOR TO SAID CONSTANT VOLTAGE; A DISCHARGE DEVICE HAVING AT LEAST A CATHODE, AN ANODE AND A CONTROL GRID; MEANS FOR CONNECTING SAID ANODE TO SAID CAPACITOR; A CLIPPING RECTIFIER CONNECTED TO SAID ALTERNATING CURRENT SUPPLY MEANS TO TRANSMIT ONLY THE NEGATIVE HALF CYCLE OF
Claim 2
Dependent Claim
81 words
A SEMICONDUCTOR DEVICE COMPRISING A SEALED ENVELOPE, CONTACT AND SEMICONDUCTOR ELEMETS MOUNTED IN SATING DIRECT CURRENT; MEANS FOR FILTERING SAID PULSATING CURRENT TO DEVELOP A SUBSTANTIALLY CONSTANT VOLTAGE; A CAPACITOR; SERIES RESISTANCE MEANS FOR CONNECTING SAID CAPACITOR TO SAID CONSTANT VOLTAGE; A DISCHARGE DEVICE HAVING AT LEAST A CATHODE, AN ANODE AND A CONTROL GRID; MEANS FOR CONNECTING SAID ANODE TO SAID CAPACITOR; A CLIPPING RECTIFIER CONNECTED TO SAID ALTERNATING CURRENT SUPPLY MEANS TO TRANSMIT ONLY THE NEGATIVE HALF CYCLE OF
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |