Patent US2072479A successfully refreshed from Google Patents.
Patent US3890147A successfully refreshed from Google Patents.
US3890147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light activating imaging process
Assignee: Xerox Corp
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Filing: 1974-05-29
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Granted: 1975-06-17
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Expires: 1994-05-29
Abstract
Abstract There is disclosed an imaging system whereby alkyl esters of polyvinylaryl sulfonic acids are selectively insolubilized upon exposure to actinic radiation.
Inventors
- 👤 Alan R Monahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:16
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
27 words
A DISPLAY PROCESS COMPRISING: A. COATING THE SURFACE OF A SUPPORT SUBSTRATE WITH A LAYER OF ALKYL ESTERS OF POLYVINYLARYL SULFONIC ACIDS SAID ESTERS SATISFYING THE FORMULA:
Claim 2
Dependent Claim
27 words
A DISPLAY PROCESS COMPRISING: A. COATING THE SURFACE OF A SUPPORT SUBSTRATE WITH A LAYER OF ALKYL ESTERS OF POLYVINYLARYL SULFONIC ACIDS SAID ESTERS SATISFYING THE FORMULA:
Claim 3
Dependent Claim
40 words
The process as disclosed in claim 1 wherein said alkyl esters of polyvinylaryl sulfonic acids are selected from at least one member of the group consisting of the methyl ester of poly(1-vinylbenzene-4-sulfonic acid) and the ethyl ester of poly(1-vinylbenzene-4-sulfonic acid).
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |