US3043693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making printing plates
Assignee: Trenton Times Corp
•
Filing: 1957-02-06
•
Granted: 1962-07-10
•
Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Strauss Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:26
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/40; C; C23; C23F; C23F1/00; C23F1/08; G03F7/16; G03F7/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF MAKING PRINTING PLATES WHICH COMPRISES APPLYING A COATING OF LIGHT SENSITIVE SHELLAC BASE COLD-TOP ENAMEL TO ONE SURFACE OF A MAGNESIUM PLATE, DRYING SAID ENAMEL WHILE MAINTAINING THE SAME IN RELATIVELY SOFT CONDITION EXPOSING SAID DRIED ENAMEL COATING TO A PREDETERMINED LIGHT PATTERN DEVELOPING THE EXPOSED ENAMEL COATING SO AS TO LEAVE ONLY PREDETERMINED SURFACES OF SAID PLATE COVERED BY SAID ENAMEL APPLYING AN ACIDIFIED AQUEOUS GUM ARABIC SOLUTION TO THE EXPOSED ENAMEL COATING APPLYING AN ETCHING INK TOP TO THE IMAGED COATED SURFACES OF SAID PLATE, APPLYING ETCHING POWDER TO THE INK TOP THEN HEATING THE PLATE TO DRY THE INK, AND THEN ETCHING SAID PLATE TO REMOVE A PORTION OF THE METAL OF THE PLATE TO PRODUCE SAID IMAGED SURFACED IN RELIEF THEREON.
Claim 2
Independent Claim
128 words
A METHOD OF MAKING PRINTING PLATES WHICH COMPRISES APPLYING A COATING OF LIGHT SENSITIVE SHELLAC BASE COLD-TOP ENAMEL TO ONE SURFACE OF A MAGNESIUM PLATE, DRYING SAID ENAMEL WHILE MAINTAINING THE SAME IN RELATIVELY SOFT CONDITION EXPOSING SAID DRIED ENAMEL COATING TO A PREDETERMINED LIGHT PATTERN DEVELOPING THE EXPOSED ENAMEL COATING SO AS TO LEAVE ONLY PREDETERMINED SURFACES OF SAID PLATE COVERED BY SAID ENAMEL APPLYING AN ACIDIFIED AQUEOUS GUM ARABIC SOLUTION TO THE EXPOSED ENAMEL COATING APPLYING AN ETCHING INK TOP TO THE IMAGED COATED SURFACES OF SAID PLATE, APPLYING ETCHING POWDER TO THE INK TOP THEN HEATING THE PLATE TO DRY THE INK, AND THEN ETCHING SAID PLATE TO REMOVE A PORTION OF THE METAL OF THE PLATE TO PRODUCE SAID IMAGED SURFACED IN RELIEF THEREON.
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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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |