US3959301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Algicidol 2-chloro-5-tolyl-1,3,4-thiadiazoles
Assignee: Gulf Research and Development Co
•
Filing: 1971-12-13
•
Granted: 1976-05-25
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Expires: 1991-12-13
Abstract
Abstract 5-Aryl-tetrazoles may be reacted with thiophosgene to yield 2-chloro-5-aryl-1,3,4-thiadiazoles which have unusually selective phytotoxic properties, being particularly useful in combating crabgrass and algae.
Inventors
- 👤 Norman A. Dahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
1 words
2-chloro-5-(o-tolyl)-1,3,4-thiadiazole.
Claim 2
Dependent Claim
1 words
2-chloro-5-(o-tolyl)-1,3,4-thiadiazole.
Claim 3
Dependent Claim
1 words
2-chloro-5-(m-tolyl)-1,3,4-thiadiazole.
Claim 4
Dependent Claim
1 words
2-chloro-5-(m-tolyl)-1,3,4-thiadiazole.
Claim 5
Dependent Claim
1 words
2-chloro-5-(p-tolyl)-1,3,4-thiadiazole.
Claim 6
Dependent Claim
1 words
2-chloro-5-(p-tolyl)-1,3,4-thiadiazole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |