Patent US2937641A successfully refreshed from Google Patents.
Patent US2494053A successfully refreshed from Google Patents.
US2494053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photolithographic printing materials
Assignee: Eastman Kodak Co
•
Filing: 1944-03-17
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Granted: 1950-01-10
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Expires: 1964-03-17
Abstract
No abstract record available.
Inventors
- 👤 Mitson Charles Howard
- 👤 Loening Erich Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:07
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/11; B; B41; B41N; B41N1/00; B41N1/12; B41N1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD OF FORMING A DESIGN IN A PRINTING SHEET OF AN INK-RECEPTIVE MATERIAL WHICH COMPRISES UNIFORMLY HYDROLYZING A SURFACE OF SAID SHEET TO RENDER SAID SURFACE INK-REPELLENT WHEN WET; SELECTIVELY REMOVING AREAS OF THE SURFACE THAT HAS BEEN UNIFORMLY HYDROLYSED WHILE PROTECTING THE REMAINING AREAS OF SAID SURFACE BY MEANS OF A STENCIL OF AN IMAGE SUPERPOSED ON THE HYDROLYZED SURFACE, AND THEREAFTER REMOVING THE STENCIL TO EXPOSE THE PROTECTED HYDROLYSED AREAS.
Claim 2
Dependent Claim
44 words
A PRINTING MEMBER COMPRISING, A SHEET OF A CELLULOSE DERIVATIVE, A HYDROLYSED SURFACE ON SAID SHEET, SAID SURFACE BEING INK-REPELLANT WHEN WET, PORTIONS OF SAID SURFACE CORRESPONDING TO A DESIGN TO BE PRINTED BEING REMOVED TO EXPOSE AN UNDERLYING INK-RECEPTIVE LAYER OF SAID SHEET.
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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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |