US2824110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-hydroxy pyrrolone-2
Assignee: EIDP Inc
•
Filing: 1953-06-16
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Granted: 1958-02-18
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Expires: 1973-06-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward G Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/30; C07D209/42; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/38; C07D209/52; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A 5-HYDROXY-2(5H)PYRROLONE HAVING ON EACH OF THE 4- AND 5-CARBONS A MONOVALENT HYDROCARBON RADICAL OF UP TO 10 CARBON ATOMS EACH, WHICH MAY BE JOINED TOGETHER, HAVING ON THE RING NITROGEN A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND MONOVALENT HYDROCARBON RADICALS OF UP TO 10 CARBON ATOMS, AND HAVING ON THE 3-CARBON A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF QUATERNARY ONIUM AND INIUM SALTS, CARBOXYL, AND GROUPS HYDROLYZABLE THERETO LINKED DIRECTLY FROM THE CARBON OF SAID GROUP TO SAID 3-CARBON OF THE PYRROLONE NUCLEUS.
Claim 2
Dependent Claim
87 words
A 5-HYDROXY-2(5H)PYRROLONE HAVING ON EACH OF THE 4- AND 5-CARBONS A MONOVALENT HYDROCARBON RADICAL OF UP TO 10 CARBON ATOMS EACH, WHICH MAY BE JOINED TOGETHER, HAVING ON THE RING NITROGEN A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND MONOVALENT HYDROCARBON RADICALS OF UP TO 10 CARBON ATOMS, AND HAVING ON THE 3-CARBON A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF QUATERNARY ONIUM AND INIUM SALTS, CARBOXYL, AND GROUPS HYDROLYZABLE THERETO LINKED DIRECTLY FROM THE CARBON OF SAID GROUP TO SAID 3-CARBON OF THE PYRROLONE NUCLEUS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |