Crysene compound
Abstract
Abstract The present invention relates to compounds of formula (I) ArCH2R1 (I) or a monomethyl or a monoethyl ether thereof (the compound of formula (I) including these ethers may contain no more than 30 carbon atoms in total); ethers, esters thereof; acid addition salts thereof; wherein Ar is a chrysene or substituted chrysene ring system; R1 contains not more than eight carbon atoms and is a group <IMAGE> wherein m is 0 or 1; R5 is hydrogen; R6 and R7 are the same or different and each is hydrogen or C1-3 alkyl optionally substituted by hydroxy; R8 and R9 are the ame or different and each is hydrogen or C1-3 alkyl; <IMAGE> is a five- or six-membered saturated carbocyclic ring; R10 is hydrogen, methyl or hydroxymethyl; R11, R12 and R13 are the same or different and each is hydrogen or methyl; R14 is hydrogen, methyl, hydroxy, or hydroxymethyl.
Inventors
- 👤 Kenneth W. Bair
Bibliographic Details
Claims Analysis
Total Claims: 12References Cited (Backward Citations)
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 |