Patent US2547542A successfully refreshed from Google Patents.
US2547542A
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Aromatic imido-esters production
Assignee: Rohm and Haas Co
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Filing: 1949-11-29
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Granted: 1951-04-03
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Expires: 1969-11-29
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:50
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS FOR THE PREPARATION OF B-PHTHALIMIDOETHYL ESTERS AND B - NAPHTHALIMIDOETHYL ESTERS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
17 words
A PROCESS FOR THE PREPARATION OF B-PHTHALIMIDOETHYL ESTERS AND B - NAPHTHALIMIDOETHYL 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 |