Patent US3248677A successfully refreshed from Google Patents.
US3248677A
Expired / Lapsed
US
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Temperature compensated semiconductor resistor
Assignee: International Business Machines Corp
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Filing: 1961-10-27
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Granted: 1966-04-26
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Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
- 👤 Lloyd P Hunter
- 👤 Joseph F Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:11
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/834; H01; H01B; H01B1/00; H01B1/04; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A TEMPERATURE COMPENSATED SEMICONDUCTOR RESISTIVE IMPEDANCE MEMBER COMPRISING A SEMICONDUCTIVE BODY OF A MATERIAL CHARACTERIZED BY HAVING A CARRIER MOBILITY WHICH VARIES IN A PREDETERMINED MANNER WITH TEMPERATURE VARIATION, SAID BODY HAVING A TEMPERATURE DEPENDENT CARRIER CONCENTRATION CHANGE "DEEP LEVEL" IMPURITY MATERIAL DISPOSED THEREIN, SAID CARRIER CONCENTRATION CHANGE VARYING
Claim 2
Dependent Claim
49 words
A TEMPERATURE COMPENSATED SEMICONDUCTOR RESISTIVE IMPEDANCE MEMBER COMPRISING A SEMICONDUCTIVE BODY OF A MATERIAL CHARACTERIZED BY HAVING A CARRIER MOBILITY WHICH VARIES IN A PREDETERMINED MANNER WITH TEMPERATURE VARIATION, SAID BODY HAVING A TEMPERATURE DEPENDENT CARRIER CONCENTRATION CHANGE "DEEP LEVEL" IMPURITY MATERIAL DISPOSED THEREIN, SAID CARRIER CONCENTRATION CHANGE VARYING
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |