Patent US3798039A successfully refreshed from Google Patents.
US3798039A
Expired / Lapsed
US
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Copy sheet containing silver soap and an organic peroxygen oxidizing compound
Assignee: Nashua Corp
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Filing: 1972-03-08
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Granted: 1974-03-19
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Expires: 1992-03-08
Abstract
Abstract An organic peroxygen oxidizing compound is incorporated in a silver soap containing white copy sheet of a two-sheet system to enhance the image contrast and reduce coloring of background areas.
Inventors
- 👤 A Leclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/4989; G03C1/49836; G03C1/49845; G03C5/00; G03C5/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
The copy sheet product defined by claim 1.
Claim 2
Dependent Claim
22 words
The copy sheet product defined by claim 1 wherein a toner is present selected from the group consisting of phthalazonone and phthalimide.
Claim 3
Dependent Claim
31 words
The copy sheet product defined by claim 1 wherein an organic auxiliary mild reducing agent is present selected from the group consisting of 2,6, dicyclohexyl cresol and 2,6, ditertiary butyl cresol.
Claim 4
Dependent Claim
43 words
The copy sheet product defined by claim 1 wherein a toner selected from the group consisting of phthalazonone and phthalimide and an organic auxiliary mild reducing agent selected from the group consisting of 2,6, dicyclohexyl cresol and 2,6, ditertiary butyl cresol are present.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |