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US3350206A
Expired / Lapsed
US
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Lithographic plates, gluconate solutions therefor and process for producing the same
Assignee: Litho Chemical and Supply Co Inc
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Filing: 1966-08-31
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Granted: 1967-10-31
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Robert F Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:32
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF PREPARING A LITHOGRAPHIC PLATE HAVING A PERMANENT, DURABLE, HYDROPHILIC SURFACE WHICH CONSISTS ESSENTIALLY IN TREATING AN ALUMINUM, CHROMIUM OR STEEL PLATE WITH AN AQUEOUS SOLUTION HAVING A PH OF 1 TO 3 AND CONTAINING GLUCONATE IONS IN A 2 TO 4% CONCENTRATION BASED ON THE WEIGHT OF THE SOLUTION.
Claim 2
Independent Claim
52 words
A METHOD OF PREPARING A LITHOGRAPHIC PLATE HAVING A PERMANENT, DURABLE, HYDROPHILIC SURFACE WHICH CONSISTS ESSENTIALLY IN TREATING AN ALUMINUM, CHROMIUM OR STEEL PLATE WITH AN AQUEOUS SOLUTION HAVING A PH OF 1 TO 3 AND CONTAINING GLUCONATE IONS IN A 2 TO 4% CONCENTRATION BASED ON THE WEIGHT OF THE SOLUTION.
References Cited (Backward Citations)
US2186945A
Cited
US3169065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |