US2956912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead sulphide semi-conductive bodies and method of making same
Assignee: US Philips Corp
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Filing: 1956-04-26
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Granted: 1960-10-18
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Kroger Ferdinand Anne
- 👤 Bloem Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/14; H10F99/00; H01; H01B; H01B1/00; H10F30/00; H10F71/00; H10P; H10P10/00; H10P95/00; H10P95/80
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A LEAD SULPHIDE SEMI-CONDUCTIVE BODY COMPRISING A SUPPORT HAVING A SURFACE PORTION CONTAINING AN ELECTROPOSITIVE ELEMENT WHOSE VALENCY EXCEEDS 2, AND AN ADJACENT PORTION FREE OF SAID ELEMENT, AND A LEAD SULPHIDE LAYER ON SAID SURFACE AND ADJACENT PORTIONS AND PRODUCED BY PRECIPITATION FROM A SOLUTION, SAID LEAD SULPHIDE LAYER PORTION ON SAID ELEMENT-COVERED SURFACE PORTION POSSESSING N-TYPE CONDUCTIVITY, SAID LEAD SULPHIDE LAYER PORTION ON SAID ADJACENT SURFACE PORTION POSSESSING P-TYPE CONDUCTIVITY.
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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |