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US3767408A
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Direct print-out photographic optical recording media comprising a rhodamine dye
Assignee: RCA Corp
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Filing: 1972-01-28
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Granted: 1973-10-23
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Expires: 1992-01-28
Abstract
Abstract A direct print-out optical recording media consists of a rhodamine type dye dissolved in a non-polar polymeric host, the rhodamine dye being in a leuco form in the host.
Inventors
- 👤 S Harrison
- 👤 J Goldmacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
16 words
The optical recording medium recited in claim 1 in the form of a self-supporting flexible tape.
Claim 2
Dependent Claim
17 words
The optical recording medium recited in claim 1 in the form of a coating upon a substrate.
Claim 3
Dependent Claim
12 words
An optical recording medium comprising a rhodamine dye having the structural formula
Claim 4
Dependent Claim
44 words
An optical recording medium comprising a rhodamine dye selected from the members of the group consisting of rhodamine B, rhodamine 6G, rhodamine 3GO, mordant red, and basic red 8, said dye dissolved in a non-polar polymeric host to form a colorless optical recording medium.
Claim 5
Dependent Claim
36 words
The optical recording medium recited in claim 2 wherein said non-polar polymeric host is selected from the group consisting of polymethyl methacrylate, polyethylene, polypropylene, polystyrene, polybutadiene, and a copolymer of methyl vinyl ether and maleic anhydride.
Claim 6
Dependent Claim
33 words
The optical recording medium recited in claim 5 wherein said dye is present in said polymeric host in a concentration of from 0.001 to 0.1 gram of dye per gram of polymeric host.
Claim 7
Dependent Claim
36 words
The optical recording medium recited in claim 5 wherein said dye is rhodamine B and wherein said dye is present in a concentration of from 0.001 to 0.1 gram of dye per gram of polymeric host.
Claim 8
Dependent Claim
36 words
The optical recording medium recited in claim 5 wherein said dye is rhodamine 6G and wherein said dye is present in a concentration of from 0.001 to 0.1 gram of dye per gram of polymeric host.
Claim 9
Dependent Claim
36 words
The optical recording medium recited in claim 5 wherein said dye is rhodamine 3GO and wherein said dye is present in a concentration of from 0.001 to 0.1 gram of dye per gram of polymeric host.
Claim 10
Dependent Claim
36 words
The optical recording medium recited in claim 5 wherein said dye is mordant red and wherein said dye is present in a concentration of from 0.001 to 0.1 gram of dye per gram of polymeric host.
Claim 11
Dependent Claim
37 words
The optical recording medium recited in claim 5 wherein said dye is basic red 8 and wherein said dye is present in a concentration of from 0.001 to 0.1 gram of dye per gram of polymeric host.
References Cited (Backward Citations)
US3690889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |