US2537256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive electric device
Assignee: AT&T Inc
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Filing: 1946-07-24
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Granted: 1951-01-09
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Expires: 1966-07-24
Abstract
No abstract record available.
Inventors
- 👤 Walter H Brattain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:06
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/14; H10F99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
LIGHT-SENSITIVE ELECTRIC DEVICE COMPRISING A BODY OF CUPROUS OXIDE, A THIN FILM OF SILICON ON A PART OF THE SURFACE OF SAID BODY OF CUPROUS OXIDE, A LIGHT-TRANSMITTING FILM OF TUNGSTEN ON SAID FILM OF SILICON, AND ELECTRICAL CONDUCTORS CONTACTING RESPECTIVELY SAID BODY OF CUPROUS OXIDE AND SAID FILM OF TUNGSTEN ON REMOTE PORTIONS OF THE SURFACES THEREOF.
Claim 2
Dependent Claim
58 words
LIGHT-SENSITIVE ELECTRIC DEVICE COMPRISING A BODY OF CUPROUS OXIDE, A THIN FILM OF SILICON ON A PART OF THE SURFACE OF SAID BODY OF CUPROUS OXIDE, A LIGHT-TRANSMITTING FILM OF TUNGSTEN ON SAID FILM OF SILICON, AND ELECTRICAL CONDUCTORS CONTACTING RESPECTIVELY SAID BODY OF CUPROUS OXIDE AND SAID FILM OF TUNGSTEN ON REMOTE PORTIONS OF THE SURFACES THEREOF.
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |