Patent US3016824A successfully refreshed from Google Patents.
US3016824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing form and method of preparing the same
Assignee: Individual
•
Filing: 1959-01-22
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Granted: 1962-01-16
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Expires: 1979-01-22
Abstract
No abstract record available.
Inventors
- 👤 Ritzerfeld Wilhelm
- 👤 Ritzerfeld Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:21
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41N; B41N1/00; B41N1/04; B41N1/08; B41N1/086; B41N3/00; B41N3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A METHOD OF PREPARING LITHOGAPHIC PRINTING FORMS, THE STEPS OF FORMIMG ON A SMOOTH FACE OF A METAL BODY A PRINTING PATTERN CONSISTING OF A FAT-ACCEPTING HYDROPHOBIC SUBSTANCE, LEAVING PORTIONS OF SAID METAL FACE FREE; AND APPLYING TO SAID SMOOTH FACE AN AQUEOUS LIQUID CONTAINING AN ORGANIC HYDROPHILIC COLLOID AND A FINELY DISPERSED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE HYDROXIDES OF BARIUM, STRONTIUM AND CALCIUM, WHEREBY THE HYDROPHILIC PROPERTIES OF SAID FREE PORTIONS OF SAID METALLIC PRINTING FACE ARE IMPROVED.
Claim 2
Dependent Claim
83 words
IN A METHOD OF PREPARING LITHOGAPHIC PRINTING FORMS, THE STEPS OF FORMIMG ON A SMOOTH FACE OF A METAL BODY A PRINTING PATTERN CONSISTING OF A FAT-ACCEPTING HYDROPHOBIC SUBSTANCE, LEAVING PORTIONS OF SAID METAL FACE FREE; AND APPLYING TO SAID SMOOTH FACE AN AQUEOUS LIQUID CONTAINING AN ORGANIC HYDROPHILIC COLLOID AND A FINELY DISPERSED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE HYDROXIDES OF BARIUM, STRONTIUM AND CALCIUM, WHEREBY THE HYDROPHILIC PROPERTIES OF SAID FREE PORTIONS OF SAID METALLIC PRINTING FACE ARE IMPROVED.
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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |