US2677651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet for electrical inscription
Assignee: STATE COLLEGE OF WASHINGTON
•
Filing: 1950-10-09
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Granted: 1954-05-04
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Expires: 1970-10-09
Abstract
No abstract record available.
Inventors
- 👤 Homer J Dana
- 👤 Raymond L Albrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:08
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A SUBSTANTIALLY DRY SHEET ADAPTED FOR VISIBLE INSCRIPTION BY PASSAGE OF ELECTRIC CURRENT THERETHROUGH COMPRISING A NON-CONDUCTING BASE MATERIAL IMPREGNATED WITH A SOLUTION OF A SUBSTANTIALLY COLORLESS NITRATE IN A POLYHYDROXY ALCOHOL AND WITH A WATER INSOLUBLE ORGANIC COMPOUND HAVING A BETA NAPHTHYL AMINE RADICAL AND CAPABLE OF FORMING QUINOID STRUCTURES BY OXIATION, SAID ORGANIC COMPOUND BEING CAPABLE OF BEING OXIDIZED IN SITU UPON DECOMPOSITION OF SAID NITRATE BY PASSAGE OF CURRENT THROUGH THE SHEET.
Claim 2
Dependent Claim
75 words
A SUBSTANTIALLY DRY SHEET ADAPTED FOR VISIBLE INSCRIPTION BY PASSAGE OF ELECTRIC CURRENT THERETHROUGH COMPRISING A NON-CONDUCTING BASE MATERIAL IMPREGNATED WITH A SOLUTION OF A SUBSTANTIALLY COLORLESS NITRATE IN A POLYHYDROXY ALCOHOL AND WITH A WATER INSOLUBLE ORGANIC COMPOUND HAVING A BETA NAPHTHYL AMINE RADICAL AND CAPABLE OF FORMING QUINOID STRUCTURES BY OXIATION, SAID ORGANIC COMPOUND BEING CAPABLE OF BEING OXIDIZED IN SITU UPON DECOMPOSITION OF SAID NITRATE BY PASSAGE OF CURRENT THROUGH THE SHEET.
References Cited (Backward Citations)
US168466A
Cited
US670510A
Cited
US2229091A
Cited
US2281013A
Cited
US2346670A
Cited
US2459521A
Cited
US2513238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |