Patent US1918554A successfully refreshed from Google Patents.
Patent US4331807A successfully refreshed from Google Patents.
US4331807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridazine urea plant growth regulators
Assignee: Individual
•
Filing: 1980-05-30
•
Granted: 1982-05-25
•
Expires: 2000-05-30
Abstract
Abstract Plant growth regulators of the N-(4-pyridazinyl)urea and thiourea type are disclosed which exhibit excellent cytokinin-like activities and are useful for regulating plant growth in various manners, such as acceleration and suppression.
Inventors
- 👤 Toshihiko Okamoto
- 👤 Yo Isogai
- 👤 Koichi Shudo
- 👤 Soshiro Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:28
CPC Classifications
A; A01; A01N; A01N47/00; A01N47/08; A01N47/28; A01N47/36; C; C07; C07D; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
Compounds of formula: ##STR5## wherein R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, a lower alkyl group, a halogen atom, a lower alkoxy group, an aryloxy group, a halomethyl group, a cyano group, an alkylthio group, a carboxy group or an alkoxycarbonyl group; X represents an oxygen atom; and n represents 1, 2 or 3; when n represents 2 or 3, R 2 each may be different.
Claim 2
Dependent Claim
77 words
Compounds of formula: ##STR5## wherein R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, a lower alkyl group, a halogen atom, a lower alkoxy group, an aryloxy group, a halomethyl group, a cyano group, an alkylthio group, a carboxy group or an alkoxycarbonyl group; X represents an oxygen atom; and n represents 1, 2 or 3; when n represents 2 or 3, R 2 each may be different.
Claim 3
Dependent Claim
42 words
The compounds of claim 1 wherein R 1 is an atom or group selected from a hydrogen atom, a chlorine atom and a methoxy group; R 2 is an atom selected from a hydrogen, chlorine and fluorine atom; and n is 1.
Claim 4
Dependent Claim
1 words
N-(4-Pyridazinyl)-N'-phenylurea.
Claim 5
Dependent Claim
1 words
N-(4-Pyridazinyl)-N'-phenylurea.
Claim 6
Dependent Claim
1 words
N-(4-Pyridazinyl)-N'-(m-fluorophenyl)urea.
Claim 7
Dependent Claim
1 words
N-(4-Pyridazinyl)-N'-(m-fluorophenyl)urea.
References Cited (Backward Citations)
GB1122662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |