US2984589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistors
Assignee: Centre National de la Recherche Scientifique
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Filing: 1958-12-22
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Granted: 1961-05-16
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Feldman Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:03
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/006; H01C1/00; H01C1/02; H01C1/034; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
AN ELECTRICAL RESISTOR WHICH COMPRISES A SUPPORT OF AN INSULATING MATERIAL, A LACUNARY FILM-LIKE DEPOSIT ON AN ATOMIC SCALE OF A HARD AND REFRACTORY METAL ON SAID SUPPORT, THE GAPS IN SAID LACUNARY DEPOSIT BEING OF SUBMICROSCOPIC SIZE, AND A LAYER OF DIELECTRIC HAVING A CONSTANT GREATER THAN 1 SUPERIMPOSED ON SAID DEPOSIT AND FILLING SAID GAPS.
Claim 2
Dependent Claim
57 words
AN ELECTRICAL RESISTOR WHICH COMPRISES A SUPPORT OF AN INSULATING MATERIAL, A LACUNARY FILM-LIKE DEPOSIT ON AN ATOMIC SCALE OF A HARD AND REFRACTORY METAL ON SAID SUPPORT, THE GAPS IN SAID LACUNARY DEPOSIT BEING OF SUBMICROSCOPIC SIZE, AND A LAYER OF DIELECTRIC HAVING A CONSTANT GREATER THAN 1 SUPERIMPOSED ON SAID DEPOSIT AND FILLING SAID GAPS.
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Cited
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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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |