US2653126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of marking
Assignee: RCA Corp
•
Filing: 1950-02-23
•
Granted: 1953-09-22
•
Expires: 1970-02-23
Abstract
No abstract record available.
Inventors
- 👤 Harold G Greig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:08
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A METHOD OF PRODUCING MARKS ELECTROLYTICALLY, THE STEPS OF: IMPREGNATING A CARRIER SUPPORT CONSISTING OF A POROUS SHEET OF MATERIAL SELECTED FROM THE CLASS CONSISTING OF PAPER AND ORGANIC FILM-FORMING MATERIALS, WITH AN AQUEOUS SOLUTION HAVING A PH WITHIN THE RANGE OF SUBSTANTIALLY NEUTRAL TO ABOUT 10.5 AND CONTAINING NITRITE IONS AND SULFAMATE IONS; AND ELECTROLYTICALLY TREATING THE IMPREGNATED SUPPORT TO RENDER IT AT LEAST TEMPORARILY ACID AT DESIRED ZONES TO CAUSE THE NITRITE AND SULFAMATE IONS TO REACT AND GENERATE GAS BUBBLES WITHIN THE SUPPORT FOR IMPARTING SUBSTANTIALLY PERMANENTLY VISIBLE CHANGES IN OPACITY TO SAID ZONES.
Claim 2
Dependent Claim
98 words
IN A METHOD OF PRODUCING MARKS ELECTROLYTICALLY, THE STEPS OF: IMPREGNATING A CARRIER SUPPORT CONSISTING OF A POROUS SHEET OF MATERIAL SELECTED FROM THE CLASS CONSISTING OF PAPER AND ORGANIC FILM-FORMING MATERIALS, WITH AN AQUEOUS SOLUTION HAVING A PH WITHIN THE RANGE OF SUBSTANTIALLY NEUTRAL TO ABOUT 10.5 AND CONTAINING NITRITE IONS AND SULFAMATE IONS; AND ELECTROLYTICALLY TREATING THE IMPREGNATED SUPPORT TO RENDER IT AT LEAST TEMPORARILY ACID AT DESIRED ZONES TO CAUSE THE NITRITE AND SULFAMATE IONS TO REACT AND GENERATE GAS BUBBLES WITHIN THE SUPPORT FOR IMPARTING SUBSTANTIALLY PERMANENTLY VISIBLE CHANGES IN OPACITY TO SAID ZONES.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |