Patent US2835576A successfully refreshed from Google Patents.
US2835576A
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Light-sensitive polyvalent metal alginate photolithographic element
Assignee: Individual
•
Filing: 1951-12-06
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Granted: 1958-05-20
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Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Anthony L Ensink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:44
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/036; G; G03; G03F; G03F7/00; G03F7/004; G03F7/04; G03F7/06; B41C; B41C1/00; B41C1/10; B41C1/1091; B41C2210/00; B41C2210/16; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A BASE SHEET AND A CONTINUOUS COATING ON THE SURFACE OF THE BASE SHEET HAVING A WATER RECEPTIVE, INK REPELLENT, HYDROPHILLIC SURFACE AND CONSISTING OF AN INSOLUBLE POLYVALENT METAL ALIGNATE AS THE ADHESIVE COLLOID, A FINELY DIVIDED INERT FILLER PRESENT IN AN AMOUNT RANGING FROM 5-8 PARTS BY WEIGHT OF FILLER TO 1 PART BY WEIGHT OD ALIGNATE AND A LIGHT SENSIZING METAL SALT WHICH REACTS FURTHER TO HARDEN THE ALGINATE UPON EXPOSURE TO LIGHT TO MAKE THE ALIGNATE INK RECEPTIVE ANS WATER REPELLENT IN THE EXPOSED AREAS, SAID LIGHT SENSIZING METAL BEING INCORPORATED IN THE ALIGNATE COATING.
Claim 2
Dependent Claim
103 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A BASE SHEET AND A CONTINUOUS COATING ON THE SURFACE OF THE BASE SHEET HAVING A WATER RECEPTIVE, INK REPELLENT, HYDROPHILLIC SURFACE AND CONSISTING OF AN INSOLUBLE POLYVALENT METAL ALIGNATE AS THE ADHESIVE COLLOID, A FINELY DIVIDED INERT FILLER PRESENT IN AN AMOUNT RANGING FROM 5-8 PARTS BY WEIGHT OF FILLER TO 1 PART BY WEIGHT OD ALIGNATE AND A LIGHT SENSIZING METAL SALT WHICH REACTS FURTHER TO HARDEN THE ALGINATE UPON EXPOSURE TO LIGHT TO MAKE THE ALIGNATE INK RECEPTIVE ANS WATER REPELLENT IN THE EXPOSED AREAS, SAID LIGHT SENSIZING METAL BEING INCORPORATED IN THE ALIGNATE COATING.
References Cited (Backward Citations)
US349760A
Cited
US696632A
Cited
US2184310A
Cited
US2366439A
Cited
US2290633A
Cited
US2311489A
Cited
FR897220A
Cited
US2542784A
Cited
US2570262A
Cited
US2534650A
Cited
US2693145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |