Patent US2841493A successfully refreshed from Google Patents.
US2841493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air type printing process
Assignee: Individual
•
Filing: 1954-10-22
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Granted: 1958-07-01
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Expires: 1974-10-22
Abstract
No abstract record available.
Inventors
- 👤 Carranza Eduardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:40
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/22; G03F; G03F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PRODUCING PRINTS OF TYPE MATTER AND OTHER LINE WORK OVER SURFACES COATED WITH A PROTEINACEOUS COLLOID, COMPRISING TREATING SAID SURFACES WITH AN AQUEOUS SOLUTION OF POTASSIUM BICHROMATE, EXPOSING THE SURFACES SO TREATED TO ACTINIC LIGHT UNDER A LINE NEGATIVE, COVERING THE AREAS SO TREATED WITH A COAT OF WATERPROOF DRAWING INK, REMOVING THE UNWANTED INK IN THE UNEXPOSED ARAS WITH A WEAK AQUEOUS SOLUTION OF SODIUM HYPOCHLORITE, AND RINSING THE TREATED SURFACES IN AN AQUEOUS SOLUTION OF SODIUM HYDROSULPHITE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR PRODUCING PRINTS OF TYPE MATTER AND OTHER LINE WORK OVER SURFACES COATED WITH A PROTEINACEOUS COLLOID, COMPRISING TREATING SAID SURFACES WITH AN AQUEOUS SOLUTION OF POTASSIUM BICHROMATE, EXPOSING THE SURFACES SO TREATED TO ACTINIC LIGHT UNDER A LINE NEGATIVE, COVERING THE AREAS SO TREATED WITH A COAT OF WATERPROOF DRAWING INK, REMOVING THE UNWANTED INK IN THE UNEXPOSED ARAS WITH A WEAK AQUEOUS SOLUTION OF SODIUM HYPOCHLORITE, AND RINSING THE TREATED SURFACES IN AN AQUEOUS SOLUTION OF SODIUM HYDROSULPHITE.
References Cited (Backward Citations)
US1170540A
Cited
GB646373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |