US3520732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photovoltaic cell and process of preparation of same
Assignee: Panasonic Holdings Corp
•
Filing: 1965-10-22
•
Granted: 1970-07-14
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Nobuo Nakayama
- 👤 Eiichi Hirota
- 👤 Tadashi Shiraishi
- 👤 Tadashi Yamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:09
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/16; H10F10/169; H10P; H10P10/00; H10P10/12; H10P95/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2651700A
Cited
US2743201A
Cited
US2843914A
Cited
US2844640A
Cited
US3290175A
Cited
US3284252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |