US2635537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper planographic printing plate with stabilized hydrophilic coating
Assignee: Warren SD Co
•
Filing: 1950-07-19
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Granted: 1953-04-21
•
Expires: 1970-07-19
Abstract
No abstract record available.
Inventors
- 👤 Stephen V Worthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:17
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A PAPER BASE HAVING THEREON A PLANOGRAPHIC PRINTING SURFACE LAYER, SAID LAYER COMPRISING INSOLUBLE HYDROPHILIC ADHESIVE MATERIAL AND FINELY DIVIDED INERT MEINERAL PIGMENT AND HAVING THEREIN CAPILLARY INTERSTICES AND PORES CONTAINING THE EVAPORATION RESIDUE OF AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE MULTIVALENT METAL SALT OF AN ACID OF THE GROUP CONSISTING OF FORMIC ACID AND ACETIC ACID IN QUANTITY IN SUBSTANTIAL EXCESS OF THAT REQUIRED FOR REACTION WITH OTHER INGREDIENTS OF SAID LAYER AND THE EVAPORATION RESIDUE OF AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE UNIUNIVALENT SALT OF THE GROUP CONSISTING OF THE ALKALI METAL AND AMMONIUM SALTS OF THE ACIDS OF THE GROUP CONSISTING OF FORMIC ACID AND ACETIC ACID IN QUANTITY AMOUNTING TO AT LEAST ONE-FIFTH OF THE WEIGHT OF THE MULTIVALENT METAL SALT.
Claim 2
Dependent Claim
130 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A PAPER BASE HAVING THEREON A PLANOGRAPHIC PRINTING SURFACE LAYER, SAID LAYER COMPRISING INSOLUBLE HYDROPHILIC ADHESIVE MATERIAL AND FINELY DIVIDED INERT MEINERAL PIGMENT AND HAVING THEREIN CAPILLARY INTERSTICES AND PORES CONTAINING THE EVAPORATION RESIDUE OF AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE MULTIVALENT METAL SALT OF AN ACID OF THE GROUP CONSISTING OF FORMIC ACID AND ACETIC ACID IN QUANTITY IN SUBSTANTIAL EXCESS OF THAT REQUIRED FOR REACTION WITH OTHER INGREDIENTS OF SAID LAYER AND THE EVAPORATION RESIDUE OF AN AQUEOUS SOLUTION CONTAINING A WATER-SOLUBLE UNIUNIVALENT SALT OF THE GROUP CONSISTING OF THE ALKALI METAL AND AMMONIUM SALTS OF THE ACIDS OF THE GROUP CONSISTING OF FORMIC ACID AND ACETIC ACID IN QUANTITY AMOUNTING TO AT LEAST ONE-FIFTH OF THE WEIGHT OF THE MULTIVALENT METAL SALT.
References Cited (Backward Citations)
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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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |