Patent US3901904A successfully refreshed from Google Patents.
US3901904A
Expired / Lapsed
US
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Certain thiadiazolyl imidazolidinones
Assignee: Velsicol Chemical LLC
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Filing: 1974-02-11
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Granted: 1975-08-26
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Expires: 1994-02-11
Abstract
Abstract The invention discloses compounds of the formula WHEREIN R1 is selected from the group consisting of alkyl of up to 3 carbon atoms, alkenyl, chloroalkyl, alkoxy, alkylthio, alkylsulfonyl and alkylsulfinyl; and R2 is alkyl.
Inventors
- 👤 John Krenzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:48
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
7 words
The compound of claim 1, 1-(5-methyl-1,3,4-thiadiazol-2-yl)-3-methyl-5-hydroxy-1,3-imidazolidin-2 -one.
Claim 4
Dependent Claim
7 words
The compound of claim 1, 1-(5-methoxy-1,3,4-thiadiazol-2-yl)-3-ethyl-5-hydroxy-1,3-imidazolidin-2 -one.
Claim 5
Dependent Claim
6 words
The compound of claim 1, 1-(5-methylthio-1,3,4-thiadiazol-2-yl)-3-propyl-5-hydroxy-1,3-imidazolidin-2-one.
Claim 6
Dependent Claim
7 words
The compound of claim 1, 1-(5-methylsulfonyl-1,3,4-thiadiazol-2-yl)-3-methyl-5-hydroxy-1,3 -imidazolidin-2-one.
Claim 7
Dependent Claim
7 words
The compound of claim 1, 1-(5-methylsulfinyl-1,3,4-thiadiazol-2-yl)-3-methyl-5-hydroxy-1,3 -imidazolidin-2-one.
References Cited (Backward Citations)
US3759939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |