US4719170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical recording material
Assignee: BASF SE
•
Filing: 1986-02-27
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Granted: 1988-01-12
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Expires: 2006-02-27
Abstract
Abstract The novel recording materials contain triquinocyclopropanes of the formula (I) <IMAGE> where R1, R2 and R3 independently of one another are each C1-C12-alkyl, in a polymer layer, and can be written on and read by means of a semiconductor laser. The information written has a high signal-to-noise ratio.
Inventors
- 👤 Wolfgang Schrott
- 👤 Peter Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:41
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; G11B7/246; G11B7/2467; G11B7/248; G11B7/249; G11B7/252; G11B7/253; G11B7/2533; G11B7/258; G11B7/2585; G11B7/2595; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/31504
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
An optical recording material consisting of a base and a dye-containing polymer layer, said polymer layer containing at least one triquinocyclopropane of the formula: ##STR5## wherein R 1 , R 2 and R 3 independently of one another are each straight-chain or branched C 1 -C 12 -alkyl.
Claim 2
Dependent Claim
48 words
An optical recording material consisting of a base and a dye-containing polymer layer, said polymer layer containing at least one triquinocyclopropane of the formula: ##STR5## wherein R 1 , R 2 and R 3 independently of one another are each straight-chain or branched C 1 -C 12 -alkyl.
Claim 3
Dependent Claim
29 words
The recording material as claimed in claim 1, wherein R 1 , R 2 , and R 3 independently of one another are each C 1 -C 4 -alkyl.
Claim 4
Dependent Claim
46 words
The recording material as claimed in claim 1, wherein R 1 , R 2 and R 3 each independently is a member selected from the group consisting of methyl, ethyl, n- and isopropyl, n- and isobutyl, 2-butyl, t-butyl, amyl, n-hexyl, n-octyl, 2-ethylhexyl, decyl, nonyl and dodecyl.
Claim 5
Dependent Claim
27 words
The recording material as claimed in claim 3, wherein R 1 , R 2 and R 3 independently of one another are each methyl, isopropyl or tetra-butyl.
Claim 6
Dependent Claim
27 words
The recording material as claimed in claim 3, wherein one or more of the radicals R 1 , R 2 and R 3 are isopropyl or tetra-butyl.
Claim 7
Dependent Claim
20 words
The recording material as claimed in claim 3, wherein R 1 , R 2 and R 3 are each i-propyl.
Claim 8
Dependent Claim
20 words
The recording material as claimed in claim 3, wherein R 1 , R 2 and R 3 are each t-butyl.
Claim 9
Dependent Claim
22 words
The recording material as claimed in claim 3, wherein R 1 is methyl and R 2 and R 3 are each t-butyl.
Claim 10
Dependent Claim
22 words
The recording material as claimed in claim 3, wherein R 1 is i-propyl and R 2 and R 3 are each t-butyl.
Claim 11
Dependent Claim
22 words
The recording material as claimed in claim 3, wherein R 1 and R 2 are each i-propyl and R 3 is t-butyl.
Claim 12
Dependent Claim
51 words
The recording material as claimed in claim 1, wherein said dye-containing polymer layer, in addition to said triquinocyclopropane dye, contains at least one dye selected from the group consisting of substituted phthalocyanines, substituted dithiolene complexes, azo dyes, anthraquinone dyes, triphenylmethane dyes, methine dyes, quadratic acid derivatives and pyrylium and thiopyrylium salts.
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |