US3697572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-aryl-n'alkyl-n'arylthio ureas as herbicides
Assignee: Chevron USA Inc
•
Filing: 1970-05-28
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Granted: 1972-10-10
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Expires: 1990-05-28
Abstract
Abstract Ureas of the formula: D R A W I N G
Inventors
- 👤 Melancthon S Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:26
CPC Classifications
C; C07; C07C; C07C313/00; C07C313/08; C07C313/18; C07C313/26; C07C313/30; C07C313/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
The urea of claim 1 wherein R is methyl, a is 1, Z is in position 4 of the benzene nucleus and is hydrogen, chlorine or alkyl of one to four carbon atoms and (a) n is 1 and Y is fluorine in position 2 or chlorine in position 4 or (b) n is 2 and one Y is chlorine in position 3 and the other Y is chlorine or bromine in position 4.
Claim 2
Dependent Claim
14 words
The urea of claim 2 wherein Z is in position 4 and is chlorine.
Claim 3
Dependent Claim
28 words
The urea of claim 1 wherein R is methyl, a is 1, Z is chlorine in position 4, n is 1 and Y is fluorine in position 2.
Claim 4
Dependent Claim
40 words
The urea of claim 1 wherein R is methyl, a is 1, Z is in position 4 and is chlorine, n is 2 and one Y is chlorine in position 3 and the other Y is chlorine in position 4.
Claim 5
Dependent Claim
29 words
The urea of claim 1 wherein R is methyl, a is 1, Z is tert. butyl in position 4, n is 1 and Y is fluorine in position 2.
Claim 6
Dependent Claim
32 words
The urea of claim 1 wherein R is methyl, a is 0, n is 2 and one Y is chlorine in position 4 and the other Y is chlorine in position 3.
Claim 7
Dependent Claim
22 words
The urea of claim 1 wherein R is methyl, a is 0, n is 1 and Y is fluorine in position 2.
Claim 8
Dependent Claim
38 words
The urea of claim 1 wherein R is methyl, a is 1, Z is chlorine in position 4, n is 2 and one Y is chlorine in position 3 and the other Y is bromine in position 4.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |