Patent US3354825A successfully refreshed from Google Patents.
US3354825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic plate and method of making same
Assignee: Ball Corp
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Filing: 1967-06-19
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Granted: 1967-11-28
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Expires: 1987-06-19
Abstract
No abstract record available.
Inventors
- 👤 John E Pickard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:32
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A METHOD OF PRODUCING AN INSOLUBLE, HYDROPHILIC LAYER ON A METAL SUBSTRATE COMPRISING APPLYING TO A CLEAN, GRAINED METAL PLATE AT A TEMPERATURE BETWEEN ABOUT 150* F. AND 190*F. A FRESHLY-PREPARED AQUEOUS COATING SOLUTION FORMED BY MIXING BETWEEN 12% AND 17% BY WEIGHT OF SODIUM PEROXIDE AND PHOSPHORUS PENTOXIDE IN WATER WHEREBY OXYGEN IS EVOLVED AT SAID SURFACE, THE RATIO OF SODIUM PEROXIDE PER MOLE OF PHOSPHORUS PENTOXIDE BEING BETWEEN ABOUT 0.5 TO 1.2 MOLES, SAID SOLUTION INCLUDING BETWEEN ABOUT 2.5% AND 4% BY WEIGHT OF SODIUM METASILICATE AND BETWEEN ABOUT 0.1% AND 1% BY WEIGHT OF SODIUM MOLYBDATE; INSOLUBILIZING COATING ON SAID SUBSTRATE BY EXPOSURE TO A CHROMATE ION, AND REMOVING ANY WATER-SOLUBLE MATERIALS REMAINING ON SAID PLATE, WHEREBY A COATING IS FORMED ON SAID SUBSTRATE.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |