US2760432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic plate and method of making it
Assignee: Harris Corp
•
Filing: 1950-05-06
•
Granted: 1956-08-28
•
Expires: 1970-05-06
Abstract
No abstract record available.
Inventors
- 👤 William H Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/04; B41N1/08; B41N1/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS OF THE CHARACTER DESCRIBED, PREPARING A LITHOGRAPHIC PLATE PROVIDING INK-ATTRACTING PORTIONS AND WATER-ATTRACTING PORTIONS BY VAPORIZING A METAL IN VACUO AND DEPOSITING IT ON A SUPPORTING BASE HAVING A HYDROPHOBIC INK-RECEPTIVE INERT SYNTHETIC RESIN SURFACE, APPLYING A LIGHT-SENSITIVE COATING TO THE DEPOSITED METAL, EXPOSING TO LIGHT WITH THE SUBJECT MATTER TO BE REPRODUCED, DEVELOPING, WHEREBY THE SURFACE OF THE DEPOSITED METAL IS BARED BETWEEN THE LIGHT-HARDENED PORTIONS OF SAID COATING, ETCHING THROUGH SUCH BARED PORTIONS OF THE DEPOSITED METAL TO THE SYNTHETIC RESIN SURFACE, REMOVING THE LIGHT-HARDENED PORTIONS OF SAID DEVELOPED COATING, AND DE-SENSITIZING THE METAL SURFACE THUS BARED.
Claim 2
Dependent Claim
55 words
A PLATE FOR LITHOGRAPHIC PRINTING PROVIDING INKATTRACTING AND WATER-ATTRACTING SURFACES, COMPRISING A SUPPORT BASE HAVING A HYDROPHOBIC INK-RECEPTIVE INERT SYNTHETIC RESIN SURFACE, SAID FIRST-NAMED SURFACES CONSISTING OF BARED PORTIONS OF SAID RESIN SURFACE AND SAID SECOND-NAMED SURFACES CONSISTING OF INTERVENTING PORTIONS OF METAL VACUUM-DEPOSITED ON SAID SYNTHETIC RESIN SURFACE AND RENDERED HYDROPHILIC BY DE-SENSITIZING TREATMENT.
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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) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |