US2916407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of silicon
Assignee: AT&T Inc
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Filing: 1956-10-04
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Granted: 1959-12-08
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Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Buck
- 👤 Frank S Mckim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:22
CPC Classifications
H; H10; H10P; H10P50/00; H10P50/60; H10P50/64; H10P50/642; H10W; H10W76/00; H10W76/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE PROCESS OF REDUCING THE SURFACE RECOMBINATION VELOCITY OF A SILICON BODY WHICH COMPRISES THE STEPS OF BOILING THE BODY FOR AT LEAST SEVERAL MINUTES IN WATER HAVING A CONDUCTANCE NO GREATER THAN OF THE ORDER OF 1X10-5 MHO/CENTIMETER AND THEREAFTER MAINTAINING THE BODY IN A GASEOUS AMBIENT SUBSTANTIALLY FREE FROM AGENTS WHICH INCREASE THE SURFACE RECOMBINATION RATE.
Claim 2
Dependent Claim
58 words
THE PROCESS OF REDUCING THE SURFACE RECOMBINATION VELOCITY OF A SILICON BODY WHICH COMPRISES THE STEPS OF BOILING THE BODY FOR AT LEAST SEVERAL MINUTES IN WATER HAVING A CONDUCTANCE NO GREATER THAN OF THE ORDER OF 1X10-5 MHO/CENTIMETER AND THEREAFTER MAINTAINING THE BODY IN A GASEOUS AMBIENT SUBSTANTIALLY FREE FROM AGENTS WHICH INCREASE THE SURFACE RECOMBINATION RATE.
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) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |