Patent US4254259A successfully refreshed from Google Patents.
US4254259A
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US
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2-Amino-5-ethylovalyl-6H-1,3,4-thiadiazine oxime
Assignee: Indiana University Research and Technology Corp
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Filing: 1978-11-02
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Granted: 1981-03-03
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Expires: 1998-11-02
Abstract
Abstract By varying the acidity, solvent polarity, and temperature of the reaction of thiosemicarbazide with ethyl 4-chloroacetoacetate, ethyl 2-amino-6H-1,3,4-thiadiazine-5-acetate hydrochloride, ethyl 2-hydrazinothiazole-4-acetate, and ethyl 2-imino-3-aminothiazoline-4-acetate hydrochloride may be prepared selectively. Further derivatives may be prepared by benzoylation and nitrosation. These compounds have demonstrated utilities as herbicides.
Inventors
- 👤 Ernest E. Campaigne
- 👤 Thomas Selby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:39
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/15; C07D285/16; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/50; C07D497/00; C07D497/02; C07D497/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
2-Amino-5-ethyloxalyl-6H-1,3,4-thiadiazine oxime of the formula (VIA) ##STR33##
Claim 2
Dependent Claim
7 words
2-Amino-5-ethyloxalyl-6H-1,3,4-thiadiazine oxime of the formula (VIA) ##STR33##
References Cited (Backward Citations)
US3862183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |