Patent US2832790A successfully refreshed from Google Patents.
US2832790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-negative functionally substituted 2, 3, 5-trichalcogenpyrrolidines, their salts, and methods for preparing them
Assignee: EIDP Inc
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Filing: 1954-09-28
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Granted: 1958-04-29
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Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward G Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:29
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 4-SUBSTITUTED PYRROLIDINES AND THEIR SALTS, SAID 4-SUBSTITUTED PYRROLINE HAVING ATTACHED TO CARBON IN EACH OF THE 2-, 3-, AND 5-POSITIONS OF THE HETEROCYCLIC NUCLEUS A CHALCOGEN OF ATOMIC NUMBER LESS THAN 17, HAVING SINGLY CHALCOGEN OF ATOMIC NUMBER LESS THAN 17, HAVING SINGLY 4-POSITION OF THE HETEROCYCLIC NUCLEUS THROUGH CARBON THEREOF A GROUP SELECTED FROM THE CLASS CONSISTING OF THE CARBOXYL GROUP AND GROUPS FREE FROM AMINOHYDROGEN WHICH UPON HYDROLYSIS ARE CONVERTED TO CARBOXYL WITH THE FORMATION OF NO ADDITIONAL ACIDIC PRODUCT OF IONIZATION CONSTANT GREATER GREATER THAN 1X10-8, AND HAVING HYDROGEN ATTACHED TO AT LEAST ONE OF THE ATOMS IN THE 1- AND 4-POSITIONS OF THE HETEROCYCLIC NUCLEUS, THE OTHER OF SAID ATOMS IN THE 1- AND 4-POSITIONS OF THE HETEROCYCLIC NUCLEUS BEING ATTACHED TO A MEMBER SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON RADICALS OF 1 TO 18 CARBON ATOMS.
Claim 2
Dependent Claim
152 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 4-SUBSTITUTED PYRROLIDINES AND THEIR SALTS, SAID 4-SUBSTITUTED PYRROLINE HAVING ATTACHED TO CARBON IN EACH OF THE 2-, 3-, AND 5-POSITIONS OF THE HETEROCYCLIC NUCLEUS A CHALCOGEN OF ATOMIC NUMBER LESS THAN 17, HAVING SINGLY CHALCOGEN OF ATOMIC NUMBER LESS THAN 17, HAVING SINGLY 4-POSITION OF THE HETEROCYCLIC NUCLEUS THROUGH CARBON THEREOF A GROUP SELECTED FROM THE CLASS CONSISTING OF THE CARBOXYL GROUP AND GROUPS FREE FROM AMINOHYDROGEN WHICH UPON HYDROLYSIS ARE CONVERTED TO CARBOXYL WITH THE FORMATION OF NO ADDITIONAL ACIDIC PRODUCT OF IONIZATION CONSTANT GREATER GREATER THAN 1X10-8, AND HAVING HYDROGEN ATTACHED TO AT LEAST ONE OF THE ATOMS IN THE 1- AND 4-POSITIONS OF THE HETEROCYCLIC NUCLEUS, THE OTHER OF SAID ATOMS IN THE 1- AND 4-POSITIONS OF THE HETEROCYCLIC NUCLEUS BEING ATTACHED TO A MEMBER SELECTED FROM THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON RADICALS OF 1 TO 18 CARBON ATOMS.
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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |