US2986591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photovoltaic cell
Assignee: International Business Machines Corp
•
Filing: 1955-10-17
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Granted: 1961-05-30
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 John A Swanson
- 👤 Paul V Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:59
CPC Classifications
G; G21; G21H; G21H1/00; G21H1/06; H; H10; H10F; H10F10/00; H10F10/10; H10F10/17; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/548
Claims Analysis
Total Claims: 0
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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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |