US2561354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic process
Assignee: Individual
•
Filing: 1947-02-03
•
Granted: 1951-07-24
•
Expires: 1967-02-03
Abstract
No abstract record available.
Inventors
- 👤 Finno James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:10
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A COMBINED INK SCUM REMOVING AND GREASE BASE INK HARDENING ETCHING COMPOSITION FOR PLANOGRAPHIC PRINTING PLATES COMPRISING, IN THE FOLLOWING PROPORTIONS, 1 TO 64 OUNCES OF GLYCERINE BY VOLUME, 1 TO 8 OUNCES OF SODIUM SULFATE, 1 TO 4 OUNCES OF SODIUM THIOSULFATE, 1 TO 4 OUNCES OF CITRIC ACID AND SUFFICIENT WATER TO PREPARE ONE GALLON OF SOLUTION, SAID SODIUM THIOSULFATE AND CITRIC ACID BEING EMPLOYED IN EQUAL AMOUNTS BY WEIGHT.
Claim 2
Dependent Claim
72 words
A COMBINED INK SCUM REMOVING AND GREASE BASE INK HARDENING ETCHING COMPOSITION FOR PLANOGRAPHIC PRINTING PLATES COMPRISING, IN THE FOLLOWING PROPORTIONS, 1 TO 64 OUNCES OF GLYCERINE BY VOLUME, 1 TO 8 OUNCES OF SODIUM SULFATE, 1 TO 4 OUNCES OF SODIUM THIOSULFATE, 1 TO 4 OUNCES OF CITRIC ACID AND SUFFICIENT WATER TO PREPARE ONE GALLON OF SOLUTION, SAID SODIUM THIOSULFATE AND CITRIC ACID BEING EMPLOYED IN EQUAL AMOUNTS BY WEIGHT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |