US3470426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film circuit element of amorphous semiconductor exhibiting a voltage variable non-linear resistance with symmetrical characteristics
Assignee: Melpar Inc
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Filing: 1964-11-18
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Granted: 1969-09-30
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Expires: 1984-11-18
Abstract
No abstract record available.
Inventors
- 👤 Charles Feldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:51
CPC Classifications
H; H10; H10P; H10P95/00; H10N; H10N70/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12535; Y10T428/12542; Y10T428/12597; Y10T428/12674; Y10T428/12736; Y10T428/12771; Y10T428/12778; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2780569A
Cited
US3343034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |