Patent US3721675A successfully refreshed from Google Patents.
US3721675A
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Oxazolidin-2-one derivatives
Assignee: LABOR LOGEAIS J FR
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Filing: 1970-03-19
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Granted: 1973-03-20
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Expires: 1990-03-19
Abstract
Abstract The 5-(piperidine-4-spiro)-oxazolidin-2-one derivatives of formula: IN WHICH R is hydrogen, an alkyl radical or an aryl radical, R1 is an alkyl radical and R2 is hydrogen, or R1 and R2 form together a methylene or ethylene bridge, R3 is hydrogen or an alkyl radical and R4 is hydrogen, halogen, an alkoxy radical or a hydroxy radical, R, R2 and R4 not being simultaneously hydrogen, have analgesic and hypotensive properties.
Inventors
- 👤 J Maillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:28
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
7 words
5-(1,2,3,4-tetrahydro-naphthalene-2:1-piperidine-4-spiro)-4-phenyl oxazolidin-2-one and its acid addition salts.
Claim 2
Dependent Claim
6 words
5-(2,3-dihydro-indene-2:1-piperidine-4-spiro)-4-ethyl-oxazolidin-2-one and its acid addition salts.
Claim 3
Dependent Claim
7 words
5-(1,2,3,4-tetrahydro-naphthalene-2:1-piperidine-4-spiro)-4-methyl -oxazolidin-2-one and its acid addition salts.
Claim 4
Dependent Claim
6 words
5-(5-methoxy-1,2,3,4-tetrahydro-naphtha-lene-2:1-piperidine-4-spiro)-4-ethyl-oxazolidin-2-one and its acid addition salts.
Claim 5
Dependent Claim
7 words
5-(1-n-propyl-1,2,3,4-tetrahydronaphthalene-2:1-piperidine-4-spiro)-4-ethyl -oxazolidin-2-one and its acid addition salts.
Claim 6
Dependent Claim
11 words
A compound as claimed in claim 1, wherein n is 2.
Claim 7
Dependent Claim
11 words
A compound as claimed in claim 1, wherein R4 is chlorine.
Claim 8
Dependent Claim
6 words
5-(1,2,3,4-Tetrahydro-naphthalene-2:1-piperidine-4-spiro)-4-ethyl-oxazolidin-2-one and its acid addition salts.
Claim 9
Dependent Claim
6 words
5-(1,2,3,4-Tetrahydro-naphthalene-2:1-piperidine-4-spiro)-oxazolidin-2-one and its acid addition salts.
Claim 10
Dependent Claim
7 words
5-(7-methoxy-1,2,3,4-tetrahydro-naphthalene-2:1-piperidine-4-spiro)-4-ethyl -oxazolidin-2-one and its acid addition salts.
Claim 11
Dependent Claim
7 words
5-(6-Chloro-1,2,3,4-tetrahydro-naphthalene-2:1-piperidine-4-spiro)-4-ethyl -oxazolidin-2-one and its acid addition salts.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |