Patent US5429309A successfully refreshed from Google Patents.
Patent US3925080A successfully refreshed from Google Patents.
US3925080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layered photosensitive material having glass substrate and method of manufacture
Assignee: US Philips Corp
•
Filing: 1973-01-24
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Granted: 1975-12-09
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Expires: 1993-01-24
Abstract
Abstract Photosensitive material consisting of glass on which a superficially saponified cellulose ester is provided through an intermediate layer consisting of an insoluble transparent metal oxide while the photosensitive compound is incorporated in the saponified layer.
Inventors
- 👤 Lambertus Postma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03F; G03F1/00; G03F1/50; G03F1/54; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31; Y10T428/315; Y10T428/31504; Y10T428/31678; Y10T428/31703
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
A METHOD OF MANUFACTURING A PHOTOSENSITIVE MATERIAL COMPRISING APPLYING TO A GLASS SUBSTRATE A LAYER OF LESS THAN 1 UM OF A METAL COMPOUND CAPABLE OF PYROLYSIS TO A TRANSPARENT INSOLUBLE METAL OXIDE, HEATING THE RESULTANT MOISTENED GLASS SUBSTRATE TO A TEMPERATURE OF FROM ABOUT 180*C TO 220*C TO THEREBY FORM AN INSOLUBLE TRANSPARENT LAYER OF METAL OXIDE ON SAID GLASS SUBSTRATE, APPLYING A LAYER OF A CELLULOSE ESTER TO SAID LAYER OF METAL OXIDE, SAPONIFYING SAID LAYER OF CELLULOSE OXIDE TO A DEPTH OF FROM 1 TO 10 U AND THEN IMPREGNATING THE RESULTANT SAPONIFIED LAYER WITH A SOLUTION OF A PHOTOSENSITIVE COMPOUND.
Claim 2
Independent Claim
104 words
A METHOD OF MANUFACTURING A PHOTOSENSITIVE MATERIAL COMPRISING APPLYING TO A GLASS SUBSTRATE A LAYER OF LESS THAN 1 UM OF A METAL COMPOUND CAPABLE OF PYROLYSIS TO A TRANSPARENT INSOLUBLE METAL OXIDE, HEATING THE RESULTANT MOISTENED GLASS SUBSTRATE TO A TEMPERATURE OF FROM ABOUT 180*C TO 220*C TO THEREBY FORM AN INSOLUBLE TRANSPARENT LAYER OF METAL OXIDE ON SAID GLASS SUBSTRATE, APPLYING A LAYER OF A CELLULOSE ESTER TO SAID LAYER OF METAL OXIDE, SAPONIFYING SAID LAYER OF CELLULOSE OXIDE TO A DEPTH OF FROM 1 TO 10 U AND THEN IMPREGNATING THE RESULTANT SAPONIFIED LAYER WITH A SOLUTION OF A PHOTOSENSITIVE COMPOUND.
Claim 3
Dependent Claim
10 words
A PHOTOSENSITIVE MATERIAL PRODUCED BY THE METHOD OF CLAIM 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |