US4508914A
Expired / Lapsed
US
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3H-Furanones
Assignee: Dynamit Nobel AG
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Filing: 1982-05-05
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Granted: 1985-04-02
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Expires: 2002-05-05
Abstract
Abstract There are disclosed substituted lactones of the formula ##STR1## wherein A stands for --CH--CH 2 X (X being Cl, Br or OH), --CHY--CHY-- (Y being Cl or Br), or ##STR2## and R 1 , R 2 and R 3 are the same or different radicals from the group of hydrogen and C 1 to C 10 alkyls, at least one of the radicals R 2 , R 2 and R 3 being such an alkyl radical, and process for making the same.
Inventors
- 👤 Hans-Georg Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:29
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07C; C07C53/00; C07C53/15; C07C53/19; C07D303/40; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D309/00; C07D309/16; C07D309/28; C07D309/30; C07D309/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A substituted lactone of the formula ##STR56## wherein X is chlorine, bromine or hydroxyl and R 1 , R 2 and R 3 are the same or different radicals from the group of hydrogen and C 1 to C 10 alkyl radicals, at least one of the radicals R 1 and R 2 being such an alkyl radical.
Claim 2
Dependent Claim
58 words
A substituted lactone of the formula ##STR56## wherein X is chlorine, bromine or hydroxyl and R 1 , R 2 and R 3 are the same or different radicals from the group of hydrogen and C 1 to C 10 alkyl radicals, at least one of the radicals R 1 and R 2 being such an alkyl radical.
Claim 3
Dependent Claim
21 words
A substituted lactone according to claim 1, wherein R 1 and R 2 are alkyl radicals and R 3 is hydrogen.
Claim 4
Dependent Claim
13 words
A substituted lactone according to claim 1 wherein X is chlorine or bromine.
Claim 5
Dependent Claim
11 words
A substituted lactone according to claim 1 wherein X is hydroxyl.
Claim 6
Dependent Claim
21 words
A substituted lactone according to claim 1 wherein each of R 1 , R 2 and R 3 are alkyl radicals.
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) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |