US3239728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor switch
Assignee: General Electric Co
•
Filing: 1962-07-17
•
Granted: 1966-03-08
•
Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 Richard W Aldrich
- 👤 Jr Nick Holonyak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
H; H10; H10D; H10D18/00; H10D18/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PNPN SEMICONDUCTOR TRIODE SWITCH COMPRISING A SEMICONDUCTOR BODY INCLUDING A BODY HAVING FOUR LAYERS ARRANGED IN SUCCESSION, CONTIGUOUS LAYERS BEING OF OPPOSITE CONDUCTIVITY TYPE, A PAIR OF INDIVIDUAL LOW RESISTANCE OHMIC CONNECTIONS TO ONE TERMINAL LAYER AND TO THE ADJACENT INTERMEDIATE LAYER RESPECTIVELY, THE OPPOSITE TERMINAL LAYER COMPRISING MORE THAN ONE ESSENTIALLY DISCRETE REGION OF ONE TYPE CONDUCTIVITY AND LOW RESISTANCE CONTACT MEANS IN CONTACT WITH AT LEAST A SURFACE OF EACH OF SAID DISCRETE REGIONS AND AN EXPOSED SURFACE OF THE
Claim 2
Dependent Claim
83 words
A PNPN SEMICONDUCTOR TRIODE SWITCH COMPRISING A SEMICONDUCTOR BODY INCLUDING A BODY HAVING FOUR LAYERS ARRANGED IN SUCCESSION, CONTIGUOUS LAYERS BEING OF OPPOSITE CONDUCTIVITY TYPE, A PAIR OF INDIVIDUAL LOW RESISTANCE OHMIC CONNECTIONS TO ONE TERMINAL LAYER AND TO THE ADJACENT INTERMEDIATE LAYER RESPECTIVELY, THE OPPOSITE TERMINAL LAYER COMPRISING MORE THAN ONE ESSENTIALLY DISCRETE REGION OF ONE TYPE CONDUCTIVITY AND LOW RESISTANCE CONTACT MEANS IN CONTACT WITH AT LEAST A SURFACE OF EACH OF SAID DISCRETE REGIONS AND AN EXPOSED SURFACE OF THE
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |