US3690953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical junction hardened solar cell
Assignee: United States Department of the Air Force
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Filing: 1970-09-10
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Granted: 1972-09-12
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Expires: 1990-09-10
Abstract
Abstract A SOLAR CELL CONSTRUCTED FROM A SLAB OF EPITAXIALLY GROWN SILICON CONTAINING A PLURALITY OF VERY THIN ALTERNATE N AND P ZONES, CUT, LAPPED, AND POLISHED TO A THICKNESS OF APPROXIMATELY .010 INCH, HAVING A COMMON DEPOSITED ALUMINUM CONTACT CONNECTING ON THE BACK SIDE OF THE CELL TO EACH OF THE N ZONES AND ANOTHER COMMON DEPOSITED ALUMINUM CONTACT ON THE BACK SIDE OF THE CELL CONNECTING TO THE P ZONES, AND THE CELL ORIENTED SUCH THAT THE DIRECTION OF IMPINGEMENT OF THE SOLAR ENERGY ON THE FRONT SURFACE OF THE CELL IS IN A DIRECTION GENERALLY PARALLEL TO THE ALTERNATE ZONES OF N AND P MATERIAL PROVIDES A HIGH EFFICIENCY, HARDENED SOLAR CELL.
Inventors
- 👤 Joseph F Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:03
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F10/00; H10F10/10; H10F19/00; H10F19/10; H10F99/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |