US2809132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating a support with a lead sulphide layer
Assignee: US Philips Corp
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Filing: 1956-04-25
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Granted: 1957-10-08
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Bloem Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:38
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/233; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A METHOD OF MAKING A SUPPORTED, SEMI-CONDUCTIVE, LEAD SULPHIDE LAYER, WHICH COMPRISES INTRODUCING A SUPPORT INTO A SOLUTION CONTAINING LEAD ACETATE, THIO-UREA AND HYDRAZINE MAINTAINED AT A TEMPERATURE IN EXCESS OF 50* C., THEREBY TO DEPOSIT THEREON A LAYER OF LEAD SULPHIDE REMOVING AND DRYING THE SUPPORTED LEAD SULPHIDE LAYER, AND THEREAFTER HEATING SAID SUPPORTED LEAD SULPHIDE LAYER AT A TEMPERATURE BETWEEN 70* AND 120*C.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |