Patent US2750404A successfully refreshed from Google Patents.
US2750404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resolution of racemic phenylserine through its racemic cyclohexyl ester and products obtained
Assignee: Pfizer Italia SRL
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Filing: 1952-06-18
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Granted: 1956-06-12
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Expires: 1972-06-18
Abstract
No abstract record available.
Inventors
- 👤 Vercellone Alberto
- 👤 Alberti Carlo Giuseppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/38; C07C227/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
RACEMIC THREO-B-PHENYLSERINE CYCLOHEXYLESTER AS A NEW PRODUCT.
Claim 2
Dependent Claim
7 words
RACEMIC THREO-B-PHENYLSERINE CYCLOHEXYLESTER AS A NEW PRODUCT.
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |