US3105783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing printing plates
Assignee: Individual
•
Filing: 1960-04-04
•
Granted: 1963-10-01
•
Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Harold B Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:57
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/20; C23F1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR ETCHING AN ALUMINUM PRINTING PLATE WHEREIN AN IMAGE HAS BEEN FORMED ON SAID PLATE BY PHOTOGRAPHIC MEANS AND WHEREIN SAID IMAGE HAS BEEN PROTECTED BY AN ACID RESISTANT COATING WHICH COMPRISES: APPLYING HYDROCHLORIC ACID TO THE SURFACE OF SAID PLATE TO PROVIDE AN INITIAL ETCH, AND THEREAFTER CONTACTING TE ENTIRE SURFACE OF THE PLATE WITH A SWAB CONTAINING AN OIL AND HYDROCHLORIC ACID, SAID OIL HAVING A SPECIFIC GRAVITY LESS THAN THE SPECIFIC GRAVITY OF SAID HYDROCHLORIC ACID, THE RATIO OF ACID TO OIL BY VOLUME BEING FROM ABOUT ONE PART ACID AND THREE PARTS OIL TO ABOUT THREE PARTS ACID AND ONE PART OIL.
Claim 2
Dependent Claim
108 words
A PROCESS FOR ETCHING AN ALUMINUM PRINTING PLATE WHEREIN AN IMAGE HAS BEEN FORMED ON SAID PLATE BY PHOTOGRAPHIC MEANS AND WHEREIN SAID IMAGE HAS BEEN PROTECTED BY AN ACID RESISTANT COATING WHICH COMPRISES: APPLYING HYDROCHLORIC ACID TO THE SURFACE OF SAID PLATE TO PROVIDE AN INITIAL ETCH, AND THEREAFTER CONTACTING TE ENTIRE SURFACE OF THE PLATE WITH A SWAB CONTAINING AN OIL AND HYDROCHLORIC ACID, SAID OIL HAVING A SPECIFIC GRAVITY LESS THAN THE SPECIFIC GRAVITY OF SAID HYDROCHLORIC ACID, THE RATIO OF ACID TO OIL BY VOLUME BEING FROM ABOUT ONE PART ACID AND THREE PARTS OIL TO ABOUT THREE PARTS ACID AND ONE PART OIL.
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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) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |