US3299081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical processes for preparing nu-substituted amidines
Assignee: Merck and Co Inc
•
Filing: 1963-09-13
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Granted: 1967-01-17
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Expires: 1983-09-13
Abstract
No abstract record available.
Inventors
- 👤 Sletzinger Meyer
- 👤 Walter A Gaines
- 👤 Victor J Grenda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:16
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/56; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/06; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/68; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE METHOD FOR MAKING AN N-SUBSTITUTED AMIDINE BY HEATING TOGETHER UNDER ANHYDROUS CONDITIONS A PRIMARY AROMATIC AMINE HYDROCHLORIDE AND A NITRILE OF THE FORMULA R-CN, WHERE R IS A MEMBER OF THE CLASS CONSISTING OF ARYL, PYRIDYL, AND FIVE-MEMBERED HETEROCYCLIC RINGS CONTAINING AT LEAST 2 CARBON ATOMS IN THE HETERO RING, WHEREIN THE HETERO ATOMS ARE SELECTED FROM THE GROUP CONSISTING OF OXYGEN, SULFUR, AND NITROGEN, THE IMPROVEMENT THAT COMPRISES CONDUCTING THE REACTION IN A SOLVENT MEDIUM COMPRISING A POLYCHLORINATED BENZENE HAVING A BOILING POINT BELOW 222*C.
Claim 2
Dependent Claim
88 words
IN THE METHOD FOR MAKING AN N-SUBSTITUTED AMIDINE BY HEATING TOGETHER UNDER ANHYDROUS CONDITIONS A PRIMARY AROMATIC AMINE HYDROCHLORIDE AND A NITRILE OF THE FORMULA R-CN, WHERE R IS A MEMBER OF THE CLASS CONSISTING OF ARYL, PYRIDYL, AND FIVE-MEMBERED HETEROCYCLIC RINGS CONTAINING AT LEAST 2 CARBON ATOMS IN THE HETERO RING, WHEREIN THE HETERO ATOMS ARE SELECTED FROM THE GROUP CONSISTING OF OXYGEN, SULFUR, AND NITROGEN, THE IMPROVEMENT THAT COMPRISES CONDUCTING THE REACTION IN A SOLVENT MEDIUM COMPRISING A POLYCHLORINATED BENZENE HAVING A BOILING POINT BELOW 222*C.
References Cited (Backward Citations)
CA558322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |