US3246025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercaptopropionic acid derivatives
Assignee: Santen Pharmaceutical Co Ltd
•
Filing: 1962-09-13
•
Granted: 1966-04-12
•
Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Mita Itaru
- 👤 Prefecture Hyogo
- 👤 Yodogawn-Ku Higashi
- 👤 Yamamoto Shiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:50
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/45; C07C323/00; C07C323/50; C07C323/51; C07C323/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A MERCAPTOPROPIONIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF CH3CHR-CONHCH2COA AND CH2R-CH2CONHCH2COA IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF SCOCH3 AND SCOC6H5 AND A IS SELECTED FROM THE GROUP CONSISTING OF OH AND NH2.
Claim 2
Dependent Claim
38 words
A MERCAPTOPROPIONIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF CH3CHR-CONHCH2COA AND CH2R-CH2CONHCH2COA IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF SCOCH3 AND SCOC6H5 AND A IS SELECTED FROM THE GROUP CONSISTING OF OH AND NH2.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |