US2742500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resolution of phenylaminopropanediols and intermediates
Assignee: EIDP Inc
•
Filing: 1953-12-22
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Granted: 1956-04-17
•
Expires: 1973-12-22
Abstract
No abstract record available.
Inventors
- 👤 Walter A Gregory
- 👤 Paulshock Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:14
CPC Classifications
C; C07; C07C; C07C317/00; C07C317/26; C07C317/32; C07C315/00; C07C315/06; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
THE PROCESS WHICH COMPRISES MIXING ENANTIOMORPHS OF A DISASTEREOISOMERIC PARA-SUBSTITUTED PHENYLAMINOPROPANEDIOL HAVING A SULFUR-CONTAINING GROUP IN THE PARA POSITION, SAID PHENYLAMINOPROPANEDIOL HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
THE PROCESS WHICH COMPRISES MIXING ENANTIOMORPHS OF A DISASTEREOISOMERIC PARA-SUBSTITUTED PHENYLAMINOPROPANEDIOL HAVING A SULFUR-CONTAINING GROUP IN THE PARA POSITION, SAID PHENYLAMINOPROPANEDIOL HAVING THE FORMULA
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 5
Dependent Claim
6 words
A COMPOUND OF THE FORMULA F-G05
Claim 6
Dependent Claim
6 words
A COMPOUND OF THE FORMULA F-G05
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |