Patent US2547494A successfully refreshed from Google Patents.
US2547494A
Expired / Lapsed
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Production of succinimido-esters
Assignee: Rohm and Haas Co
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Filing: 1949-12-17
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Granted: 1951-04-03
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Expires: 1969-12-17
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:38
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D207/408; C07D207/412; C10; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/086; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A PROCESS FOR THE PREPARATION OF B-SUCCINIMIDOETHYL ESTERS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
12 words
A PROCESS FOR THE PREPARATION OF B-SUCCINIMIDOETHYL ESTERS OF THE GENERAL FORMULA
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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |