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Patent US2991290A successfully refreshed from Google Patents.
US2991290A
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Nu-alkylamino-alpha-hydroxy-alkanoic acid amides
Assignee: US Vitamin Corp
•
Filing: 1957-03-20
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Granted: 1961-07-04
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Expires: 1977-03-20
Abstract
No abstract record available.
Inventors
- 👤 Seymour L Shapiro
- 👤 Freedman Louis
- 👤 Ira M Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:18
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07D209/00; C07D209/02; C07D209/04; C07D209/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
AMINOALKYLENEAMIDE BASES HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
AMINOALKYLENEAMIDE BASES HAVING THE FORMULA:
References Cited (Backward Citations)
US2009144A
Cited
US2733256A
Cited
US2820801A
Cited
US2425392A
Cited
US2715645A
Cited
US2826578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |