Patent US3201247A successfully refreshed from Google Patents.
US3201247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treated lithographic plates and production thereof
Assignee: Litho Chemical and Supply Co Inc
•
Filing: 1964-03-18
•
Granted: 1965-08-17
•
Expires: 1984-03-18
Abstract
No abstract record available.
Inventors
- 👤 Robert F Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:48
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038; C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/40; C23C22/42; C23C22/82; C23C22/83
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
A METHOD OF PREPARING A PHOSPHOMOLYBDATE TREATED LITHOGRAPHIC PLATE WHICH COMPRISES IMMERSING AT A TEMPERATURE OF 155 TO 180*F. A CLEANED METAL PLATE IN AN AQUEOUS BATH CONSISTING ESSENTIALLY OF WATER, PHOSPHOMOLYBDATE IONS AND CATIONS THEREFOR, SAID BATH HAVING A PH OF ABOUT 4 TO 6, TO FORM ON THE PLATE SURFACES THE PHOSPHOMOLYBDATE REACTION PRODUCT OF THE PLATE METAL, SEALING THE COATING THUS FORMED BY IMMERSION IN A SEALING BATH AT A TEMPERATURE OF 200*F. TO 212*F., DRYING THE THUS TREATED PLATE AND APPLYING THERETO A WATER-SOLUBLE DIAZO RESIN SENSITIZER COATING.
Claim 2
Independent Claim
92 words
A METHOD OF PREPARING A PHOSPHOMOLYBDATE TREATED LITHOGRAPHIC PLATE WHICH COMPRISES IMMERSING AT A TEMPERATURE OF 155 TO 180*F. A CLEANED METAL PLATE IN AN AQUEOUS BATH CONSISTING ESSENTIALLY OF WATER, PHOSPHOMOLYBDATE IONS AND CATIONS THEREFOR, SAID BATH HAVING A PH OF ABOUT 4 TO 6, TO FORM ON THE PLATE SURFACES THE PHOSPHOMOLYBDATE REACTION PRODUCT OF THE PLATE METAL, SEALING THE COATING THUS FORMED BY IMMERSION IN A SEALING BATH AT A TEMPERATURE OF 200*F. TO 212*F., DRYING THE THUS TREATED PLATE AND APPLYING THERETO A WATER-SOLUBLE DIAZO RESIN SENSITIZER COATING.
Claim 3
Dependent Claim
81 words
A PRESENSITIZED PLATE SUITABLE FOR LITHOGRAPHIC PRINTING AND CAPABLE OF BEING STORED AND THEN USED UP TO MONTHS AFTER MANUFACTURE COMPRISING A THIN METAL SHEET SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC AND COPPER WHICH HAS ON AT LEAST ONE SURFACE THEREOF A PHOSPHOMOLYBDATE FILM OF THE PLATE METAL WHICH HAS BEEN FORMED THEREON BY REACTING AT A TEMPERATURE OF 155*F. TO 180*F. A SURFACE OF SAID PLATE WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER, PHOSPHOMOLYBDATE IONS AND CATIONS
Claim 4
Dependent Claim
81 words
A PRESENSITIZED PLATE SUITABLE FOR LITHOGRAPHIC PRINTING AND CAPABLE OF BEING STORED AND THEN USED UP TO MONTHS AFTER MANUFACTURE COMPRISING A THIN METAL SHEET SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC AND COPPER WHICH HAS ON AT LEAST ONE SURFACE THEREOF A PHOSPHOMOLYBDATE FILM OF THE PLATE METAL WHICH HAS BEEN FORMED THEREON BY REACTING AT A TEMPERATURE OF 155*F. TO 180*F. A SURFACE OF SAID PLATE WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF WATER, PHOSPHOMOLYBDATE IONS AND CATIONS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |