Patent US3168552A successfully refreshed from Google Patents.
US3168552A
Expired / Lapsed
US
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3-(2-isopentenyl)-4-hydroxy benzoic acid and derivatives and preparation thereof
Assignee: Pharmacia and Upjohn Co
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Filing: 1955-12-05
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Granted: 1965-02-02
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Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Hoeksema Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:55
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/19; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 3-($,$-DIMETHYLALLY)-4-HYDROXYBENZOIC ACID AND 3-($,$DIMETHYLALLY)-4-ACETOXYBENZOIC ACID.
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 3-($,$-DIMETHYLALLY)-4-HYDROXYBENZOIC ACID AND 3-($,$DIMETHYLALLY)-4-ACETOXYBENZOIC ACID.
Claim 3
Dependent Claim
2 words
ETHYL 3-($,$-DIMETHYLALLY)4-HYDROXYBENZOATE.
Claim 4
Dependent Claim
2 words
ETHYL 3-($,$-DIMETHYLALLY)4-HYDROXYBENZOATE.
Claim 5
Dependent Claim
28 words
A PROCESS FOR MAKING 3-(3-METHYL-2-BUTENY)-4-HYDROXYBENZOIC ACID WHICH COMPRISES (1) HEATING STREPTONIVICIN WITH ACETIC ANHYDRIDE TO FORM 3-(3-METHYL-/2-BUTENYL)-4-ACETOXYBENZOIC ACID, AND (2) HYDROLYZING THE ACETOXY GROUP TO FORM 3-(3-METHYL-2-BUTENYL)-4-HYDROXYBENZOIC ACID.
Claim 6
Dependent Claim
28 words
A PROCESS FOR MAKING 3-(3-METHYL-2-BUTENY)-4-HYDROXYBENZOIC ACID WHICH COMPRISES (1) HEATING STREPTONIVICIN WITH ACETIC ANHYDRIDE TO FORM 3-(3-METHYL-/2-BUTENYL)-4-ACETOXYBENZOIC ACID, AND (2) HYDROLYZING THE ACETOXY GROUP TO FORM 3-(3-METHYL-2-BUTENYL)-4-HYDROXYBENZOIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |