Patent US3480473A successfully refreshed from Google Patents.
US3480473A
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Method of producing polycrystalline photovoltaic cells
Assignee: Kewanee Oil Co
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Filing: 1966-06-24
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Granted: 1969-11-25
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Expires: 1986-06-24
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Tanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:13
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/18; H10F10/16; H10F10/169; H10P; H10P95/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y10; Y10S; Y10S148/00; Y10S148/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2820841A
Cited
US2880119A
Cited
US3222215A
Cited
US3194703A
Cited
US3186874A
Cited
US3218204A
Cited
US3374108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |