US3266871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical resolution of racemic substances
Assignee: Ajinomoto Co Inc
•
Filing: 1963-10-08
•
Granted: 1966-08-16
•
Expires: 1983-10-08
Abstract
No abstract record available.
Inventors
- 👤 Mizoguchi Naomasa
- 👤 Hara Minoru
- 👤 Ito Kenkichi
- 👤 Akashi Takekazu
- 👤 Ohno Ko
- 👤 Kato Jiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:49
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0036; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
AN APPARATUS FOR OPTICALLY RESOLVING A RACEMIC SUBSTANCE HAVING TWO CORRESPONDING ENANTIOMORPHS INTO THE RESPECTIVE ENANTIOMORPHS WHICH COMPRISES: (A) A CONTAINER; (B) A SCREEN MEMBER IN SAID CONTAINER AND SEPARATING THE SAME INTO TWO COMPARTMENTS, SAID SCREEN MEMBER BEING FORMED WITH PERFORATIONS OF PREDETERMINED SIZE; (C) FEEDING MEANS FOR CONTINUOUSLY FEEDING A SUPERSATURATED SOLUTIION OF SAID RACEMIC SUBSTANCE TO SAID CONTAINER; (D) OVERFLOW MEANS ON SAID CONTAINER FOR DISCHARGING SAID SOLUTION THEREFROM; (E) A SUPPLY OF CRYSTAL SEEDS OF ONE OF SAID ENANTIOMORPHS IN ONE OF SAID COMPARTMENTS AND A SUPPLY OF CRYSTAL SEEDS OF THE OTHER ENANTIOMRPH IN THE OTHER COMPARTMENT, SAID CRYSTAL SEEDS BEING OF A SIZE SUFFICIENT TO PREVENT PASSAGE THEREOF THROUGH THE PERFORATIONS OF SAID SCREEN MEMBER; (F) STIRRING MEANS IN EACH OF SAID COMPARTMENTS FOR STIRRING THE SOLUTION FED TO SAID CONTAINER AT A RATE SUFFICIENT TO SUBSTANTIALLY UNIFORMLY SUSPEND SAID CRYSTAL SEEDS IN THE CORRESPONDING COMPARTMENTS AND TO UNIFORMLY MIX THE TWO PORTIONS OF SAID SOLUTION IN SAID COMPARTMENTS; AND (G) RETAINING MEANS AT SAID OVERFLOW MEANS FOR RETAINING SAID CRYSTAL SEEDS IN SAID CONTAINER WHILE PERMITTING OVERFLOW OF SAID SOLUTION.
Claim 2
Independent Claim
187 words
AN APPARATUS FOR OPTICALLY RESOLVING A RACEMIC SUBSTANCE HAVING TWO CORRESPONDING ENANTIOMORPHS INTO THE RESPECTIVE ENANTIOMORPHS WHICH COMPRISES: (A) A CONTAINER; (B) A SCREEN MEMBER IN SAID CONTAINER AND SEPARATING THE SAME INTO TWO COMPARTMENTS, SAID SCREEN MEMBER BEING FORMED WITH PERFORATIONS OF PREDETERMINED SIZE; (C) FEEDING MEANS FOR CONTINUOUSLY FEEDING A SUPERSATURATED SOLUTIION OF SAID RACEMIC SUBSTANCE TO SAID CONTAINER; (D) OVERFLOW MEANS ON SAID CONTAINER FOR DISCHARGING SAID SOLUTION THEREFROM; (E) A SUPPLY OF CRYSTAL SEEDS OF ONE OF SAID ENANTIOMORPHS IN ONE OF SAID COMPARTMENTS AND A SUPPLY OF CRYSTAL SEEDS OF THE OTHER ENANTIOMRPH IN THE OTHER COMPARTMENT, SAID CRYSTAL SEEDS BEING OF A SIZE SUFFICIENT TO PREVENT PASSAGE THEREOF THROUGH THE PERFORATIONS OF SAID SCREEN MEMBER; (F) STIRRING MEANS IN EACH OF SAID COMPARTMENTS FOR STIRRING THE SOLUTION FED TO SAID CONTAINER AT A RATE SUFFICIENT TO SUBSTANTIALLY UNIFORMLY SUSPEND SAID CRYSTAL SEEDS IN THE CORRESPONDING COMPARTMENTS AND TO UNIFORMLY MIX THE TWO PORTIONS OF SAID SOLUTION IN SAID COMPARTMENTS; AND (G) RETAINING MEANS AT SAID OVERFLOW MEANS FOR RETAINING SAID CRYSTAL SEEDS IN SAID CONTAINER WHILE PERMITTING OVERFLOW OF SAID SOLUTION.
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |