US2816915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of phenyl-serines
Assignee: EIDP Inc
•
Filing: 1953-11-20
•
Granted: 1957-12-17
•
Expires: 1973-11-20
Abstract
No abstract record available.
Inventors
- 👤 Walter A Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:38
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A PROCESS FOR SEPARATING A MIXTURE OF TWO DIASTEREOISOMERS OF THE FORMULA
Claim 2
Dependent Claim
12 words
A PROCESS FOR SEPARATING A MIXTURE OF TWO DIASTEREOISOMERS OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |