US2644852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Germanium photocell
Assignee: General Electric Co
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Filing: 1951-10-19
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Granted: 1953-07-07
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Expires: 1971-10-19
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:23
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10D; H10D62/00; H10D62/10; H10D62/80; H10D62/83; H10D62/834; H10F30/00; H10F30/20; H10F99/00; H10P; H10P95/00; H10W; H10W72/00; H10W76/00; H10W76/10; H10W76/17; H10W76/60; H10W99/00; Y; Y02; Y02E; Y02E10/00; Y02E10/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PHOTOSENSITIVE DEVICE COMPRISING A GERMANIUM WAFER HAVING A THICKNESS NOT GREATER THAN .050 INCH AND HAVING ALONG ITS THICKNESS DIMENSION A P-TYPE REGION, AN N-TYPE REGION, AND AN INTERMEDIATE P-N JUNCTION, SEPARATE CONDUCTORS CONNECTED TO A SUBSTANTIAL AREA OF SAID P- AND N-TYPE REGIONS RESPECTIVELY, AND MEANS FOR DIRECTING LIGHT THROUGH ONE OF SAID REGIONS TO IMPINGE UPON SAID P-N JUNCTION FROM A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF SAID JUNCTION, THE REGION THROUGH WHICH LIGHT IS DIRECTED BEING LESS THAN .001 INCH THICK.
Claim 2
Dependent Claim
86 words
A PHOTOSENSITIVE DEVICE COMPRISING A GERMANIUM WAFER HAVING A THICKNESS NOT GREATER THAN .050 INCH AND HAVING ALONG ITS THICKNESS DIMENSION A P-TYPE REGION, AN N-TYPE REGION, AND AN INTERMEDIATE P-N JUNCTION, SEPARATE CONDUCTORS CONNECTED TO A SUBSTANTIAL AREA OF SAID P- AND N-TYPE REGIONS RESPECTIVELY, AND MEANS FOR DIRECTING LIGHT THROUGH ONE OF SAID REGIONS TO IMPINGE UPON SAID P-N JUNCTION FROM A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF SAID JUNCTION, THE REGION THROUGH WHICH LIGHT IS DIRECTED BEING LESS THAN .001 INCH THICK.
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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |