Patent US3853952A successfully refreshed from Google Patents.
US3853952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-ethynylcyclopropane compounds and process for the preparation thereof
Assignee: Sankyo Co Ltd
•
Filing: 1971-06-23
•
Granted: 1974-12-10
•
Expires: 1991-06-23
Abstract
Abstract Novel 2-ethynylcyclopropane compounds having the formula WHEREIN R1 represents hydrogen atom, a straight or branched lower alkyl group or an aryl group which may be substituted with trifluoromethyl, nitro, halogen, a lower alkyl or a lower alkoxy, R2 and R3 may be the same or different and each represents hydrogen atom, a straight or branched lower alkyl group, a substituted or unsubstituted aryl group or an alkoxycarbonyl group and R4 represents hydrogen atom or a hydrocarbon group such as alkyl, aryl and aralkyl and the salt thereof.
Inventors
- 👤 Y Kishida
- 👤 M Yoshimoto
- 👤 N Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:15
CPC Classifications
A; A01; A01N; A01N53/00; A61; A61P; A61P29/00; A61P3/00; A61P3/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
6 words
2-Phenylethynyl-1-carboxycyclopropane of the formula of claim
Claim 4
Dependent Claim
7 words
2-Phenylethynyl-1-methoxycarbonylcyclopropane of the formula of claim 1.
Claim 5
Dependent Claim
7 words
2-p-Bromophenylethynyl-1-methoxycarbonylcyclopropane of the formula of claim 1.
Claim 6
Dependent Claim
7 words
3-Methyl-2-phenylethynyL-1-methoxycarbonylcyclopropane of the formula of claim 1.
Claim 7
Dependent Claim
7 words
2-Phenylethynyl-1-ethoxycarbonylcyclopropane of the formula of claim 1.
Claim 8
Dependent Claim
7 words
2-p-Bromophenylethynyl-1-carboxycyclopropane of the formula of claim 1.
Claim 9
Dependent Claim
7 words
3Phenylethynyl-1-benzyloxycarbonylcyclopropane of the formula of claim 1.
Claim 10
Dependent Claim
7 words
3-Phenyl-2-p-bromophenylethynyl-1-methoxycarbonylcyclopropane of the formula of claim 1.
Claim 11
Dependent Claim
7 words
3,3-Dimethyl-2-phenylethynyl-1-ethoxycarbonylcyclopropane of the formula of claim 1.
Claim 12
Dependent Claim
7 words
3-Phenylethynyl-1,2-bis(methoxycarbonyl)cyclopropane of the formula of claim 1.
Claim 13
Dependent Claim
9 words
2-Phenylethynyl-1-carboxycyclopropane sodium salt of the formula of claim 1.
References Cited (Backward Citations)
US3445499A
Cited
US3397223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |