Patent US3759660A successfully refreshed from Google Patents.
Patent US4956508A successfully refreshed from Google Patents.
US4956508A
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US
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Process for preparing polyalkyl perylenes, perylenes obtained by this process, and organic materials with ESR properties derived from the same
Assignee: Thales SA
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Filing: 1989-02-08
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Granted: 1990-09-11
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Expires: 2009-02-08
Abstract
Abstract The invention relates to a process for preparing a polyalkyl perylene which consists in subjecting the corresponding polyalkyl 1,1'-dinaphthalene derivative to a cyclodehydrogenation reaction, by means of an alkali metal. It also relates to the polyalkyl perylene obtained, and to the organic material derived therefrom exhibiting an electron spin resonance spectrum.
Inventors
- 👤 Philippe Michel
- 👤 Alexandre Moradpour
- 👤 Paul Penven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:06
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C2603/00; C07C2603/02; C07C2603/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A polyalkyl perylene compound which has the formula: ##STR1## wherein R is methyl.
Claim 2
Dependent Claim
13 words
A polyalkyl perylene compound which has the formula: ##STR1## wherein R is methyl.
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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |