Patent US3690883A successfully refreshed from Google Patents.
US3690883A
Expired / Lapsed
US
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Method of forming a litho plate by diffusion transfer
Assignee: Polaroid Corp
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Filing: 1970-01-30
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Granted: 1972-09-12
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Expires: 1990-01-30
Abstract
Abstract A METHOD FOR SELECTIVELY ELIMINATING HYDROPHOBIC PORTIONS OF A PHOTOLITHOGRAPHIC PRINTING SURFACE TO MODIFY THE INFORMATION CONTAINED IN SAID SURFACE OR ADD INFORMATION TO SAID SURFACE. ESSENTIALLY, THE METHOD INVOLVES THE STEP OF APPLYING A HYDROPHILIC COATING TO SELECTED PORTIONS OF THE HYDROPHOBIC PRINTING PATTERN CONTAINED IN SAID PLATE.
Inventors
- 👤 Albert L Hyland Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |