Patent US2882154A successfully refreshed from Google Patents.
US2882154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planographic printing plate
Assignee: Polychrome Corp
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Filing: 1954-05-03
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Granted: 1959-04-14
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Cohn Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:01
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
THE METHOD OF PREPARING A PRESENSITIZED, ALUMINUM PLANOGRAPHIC PRINTING PLATE WHICH COMPRISES MECHANICALLY GRAINING THE ALUMINUM SURFACE BY ABRASIVE ACTION, COATING THE GRAINED SURFACE WITH A SILICEOUS LAYER BY TREATMENT WITH ALKALI SILICATE SOLUTION, AND HARDENING SAID SILICEOUS LAYER BY TREATMENT WITH AQUEOUS SOLUTION CONTAINING AT LEAST 3 PERCENT, BY WEIGHT, OF CALCIUM NITRATE.
References Cited (Backward Citations)
US1325890A
Cited
US1155186A
Cited
GB407830A
Cited
DE642782C
Cited
US2507314A
Cited
US2676886A
Cited
US2714066A
Cited
US2732796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |