Patent US3987054A successfully refreshed from Google Patents.
US3987054A
Expired / Lapsed
US
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4,5,6,7-tetrahydrobenzimidazoles
Assignee: Pliva Farmaceutika dd
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Filing: 1970-09-23
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Granted: 1976-10-19
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Expires: 1990-09-23
Abstract
Abstract Corrosion inhibitors and preservatives of the following formula ##SPC1## Wherein R 1 is hydrogen; R 2 is selected from the group which consists of hydrogen, the diacetoxypropionic acid methyl ester and the diacetoxypropionic acid dialkylaminoethylamide with 1 to 4 carbon atoms in the alkyl group; R 3 is hydrogen, unbranches or branched alkyl with 1 to 10 carbon atoms, carboxyl or alkoxycarbonyl wherein the alkoxy contains from 1 to 4 carbon atoms; and R 4 is hydrogen, unbranched or branched alkyl with 1 to 4 carbon atoms; or acid addition or quaternary ammonium salts thereof.
Inventors
- 👤 Ivan Butula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:17
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/06; C07D235/10; C07D235/12; C07D235/16; C07D235/18; C07D235/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
3 words
3-(4,5,6,7-tetrahydrobenzamidazolyl)-(2)-2,3-diacetoxypropionic acid diethylamino-ethylamide.
Claim 2
Dependent Claim
3 words
3-(4,5,6,7-tetrahydrobenzamidazolyl)-(2)-2,3-diacetoxypropionic acid diethylamino-ethylamide.
Claim 3
Dependent Claim
4 words
3-(4,5,6,7-tetrahydrobenzimidazolyl)-(2)-2,3-diacetoxypropionic acid methyl ester.
Claim 4
Dependent Claim
4 words
3-(4,5,6,7-tetrahydrobenzimidazolyl)-(2)-2,3-diacetoxypropionic acid methyl ester.
Claim 5
Dependent Claim
90 words
A compound of the following formula: ##SPC5## wherein: R 1 is hydrogen R 2 is selected from the group consisting of the diacetoxypropionic acid methyl ester and the diacetoxypropionic acid dialkylamino-ethylamide with 1 to 4 carbon atoms in the alkyl group; R 3 is hydrogen, unbranched or branched alkyl with 1 to 18 carbon atoms, carboxyl, or alkoxycarbonyl wherein the alkoxy contains 1 to 4 carbon atoms; and R 4 is hydrogen, unbranched or branched alkyl with 1 to 4 carbon atoms; or acid addition or quaternary ammonium salts thereof.
Claim 6
Dependent Claim
90 words
A compound of the following formula: ##SPC5## wherein: R 1 is hydrogen R 2 is selected from the group consisting of the diacetoxypropionic acid methyl ester and the diacetoxypropionic acid dialkylamino-ethylamide with 1 to 4 carbon atoms in the alkyl group; R 3 is hydrogen, unbranched or branched alkyl with 1 to 18 carbon atoms, carboxyl, or alkoxycarbonyl wherein the alkoxy contains 1 to 4 carbon atoms; and R 4 is hydrogen, unbranched or branched alkyl with 1 to 4 carbon atoms; or acid addition or quaternary ammonium salts thereof.
References Cited (Backward Citations)
FR2003995A1
Cited
GB1260294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |