Patent US2580494A successfully refreshed from Google Patents.
US2580494A
Expired / Lapsed
US
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N-disubstituted-amino t-hydroxy ketones
Assignee: Publicker Ind Inc
•
Filing: 1947-04-10
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Granted: 1952-01-01
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Expires: 1967-04-10
Abstract
No abstract record available.
Inventors
- 👤 Richard S Wilder
- 👤 Daniel F Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:36
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/10; C07D295/104; C07D295/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
N-DISUBUTITUTED AMINO-T-HYDROXY KETONES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
N-DISUBUTITUTED AMINO-T-HYDROXY KETONES OF THE GENERAL FORMULA
References Cited (Backward Citations)
GB479939A
Cited
US2344814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |