US3919252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,6 Dihalobenzyl ethers
Assignee: Shell USA Inc
•
Filing: 1974-06-21
•
Granted: 1975-11-11
•
Expires: 1994-06-21
Abstract
Abstract wherein R1 is alkyl: R2 is alkyl, aryl or aralkyl; R3 is hydrogen or alkyl or R2 and R3 together is polymethylene; and R4 is 2,6-dihalobenzyl are useful as herbicides. Compounds of the formula
Inventors
- 👤 Michael D Barker
- 👤 Eirlys R Isaac
- 👤 Peter Kirby
- 👤 Graham C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/72; C07D317/10; C07D317/14; C07D317/18; C07D317/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
8 words
A 2, 6-DIHALOBENZYL ETHER HAVING THE FOLLOWING FORMULA
Claim 2
Dependent Claim
8 words
A 2, 6-DIHALOBENZYL ETHER HAVING THE FOLLOWING FORMULA
Claim 3
Dependent Claim
14 words
A compound according to claim 1 wherein 2,6-dihalobenzyl group is 2,6-dichlorobenzyl, 2-chloro-6-fluorobenzyl, or 2,6-difluorobenzyl.
Claim 4
Dependent Claim
28 words
A compound according to claim 2 and having a structure defined by formula I wherein R1 is ethyl; R2 and R3 are each methyl and R4 is 2,6-dichlorobenzyl.
Claim 5
Dependent Claim
26 words
A compound according to claim 2 and having a structure defined by formula I wherein R1, R2 and R3 are each methyl and R4 is 2,6-dichlorobenzyl.
Claim 6
Dependent Claim
30 words
A compound according to claim 2 and having a structure defined by formula I wherein R1 is methyl; R2 and R3 together form a pentamethylene group and R4 is 2,6-dichlorobenzyl.
Claim 7
Dependent Claim
28 words
A compound according to claim 2 and having a structure defined by formula I wherein R1 is ethyl; R2 and R3 are each methyl and R4 is 2-chloro-6-fluorobenzyl.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |