Patent US3008409A successfully refreshed from Google Patents.
US3008409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy printing plate and method of making it
Assignee: RR Donnelley and Sons Co
•
Filing: 1957-11-08
•
Granted: 1961-11-14
•
Expires: 1977-11-08
Abstract
No abstract record available.
Inventors
- 👤 Robert B Wentworth
- 👤 Kenneth L Strachan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:26
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038; B41C; B41C1/00; B41C1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A PROCESS FOR PRODUCING A DUPLICATE PRINTING PLATE FROM AN ORIGINAL FORM, THE STEPS OF: TREATING A BLANK MAGNESIUM ALLOY PLATE WITH A DILUTE SUBSTANTIALLY PURE SOLUTION OF HYDROFLUORIC ACID TO PROVIDE A RESIST ADHERENT SURFACE, PRINTING THE ORIGINAL FORM ON SAID PLATE IN AN ACID AND SOLVENT RESISTANT INK, FORTIFYING SAID INK BY THE APPLICATION OF A COMPATIBLE THERMOPLASTIC ACID AND SOLVENT RESISTANT RESIN: AND HEATING SAID PLATE TO FUSE SAID INK AND RESIN INTO AN ACID AND SOLVENT RESISTANT RESIST.
Claim 2
Dependent Claim
83 words
IN A PROCESS FOR PRODUCING A DUPLICATE PRINTING PLATE FROM AN ORIGINAL FORM, THE STEPS OF: TREATING A BLANK MAGNESIUM ALLOY PLATE WITH A DILUTE SUBSTANTIALLY PURE SOLUTION OF HYDROFLUORIC ACID TO PROVIDE A RESIST ADHERENT SURFACE, PRINTING THE ORIGINAL FORM ON SAID PLATE IN AN ACID AND SOLVENT RESISTANT INK, FORTIFYING SAID INK BY THE APPLICATION OF A COMPATIBLE THERMOPLASTIC ACID AND SOLVENT RESISTANT RESIN: AND HEATING SAID PLATE TO FUSE SAID INK AND RESIN INTO AN ACID AND SOLVENT RESISTANT RESIST.
References Cited (Backward Citations)
US567926A
Cited
US747791A
Cited
US1171725A
Cited
US1330581A
Cited
US1687593A
Cited
US2521648A
Cited
US2613165A
Cited
US2762694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |