Patent US2900310A successfully refreshed from Google Patents.
US2900310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removing omega-aminocapronitrile from crude mixtures thereof
Assignee: Stamicarbon BV
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Filing: 1957-12-13
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Granted: 1959-08-18
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Expires: 1977-12-13
Abstract
No abstract record available.
Inventors
- 👤 Johannes H Ottenheym
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:45
CPC Classifications
C; C07; C07C; C07C255/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR RECOVERING W-AMINOCAPRONITRILE FROM CRUDE MIXTURES THEREOF WITH W-CAPROLACTAM AND WATER WHICH COMPRISES ADDING TO SAID MIXTURE, AN INERT ORGANIC SOLVENT WHICH FORMS AN AZEOTROPE WITH WATER, EVAPORATING AT LEAST PART OF THE WATER IN SAID MIXTURE TOGETHER WITH SAID SOLVENT AND THEREAFTER DISTILLING THE W-AMINOCAPRONITRILE FROM THE REMAINDER OF SAID MIXTURE.
Claim 2
Dependent Claim
54 words
A PROCESS FOR RECOVERING W-AMINOCAPRONITRILE FROM CRUDE MIXTURES THEREOF WITH W-CAPROLACTAM AND WATER WHICH COMPRISES ADDING TO SAID MIXTURE, AN INERT ORGANIC SOLVENT WHICH FORMS AN AZEOTROPE WITH WATER, EVAPORATING AT LEAST PART OF THE WATER IN SAID MIXTURE TOGETHER WITH SAID SOLVENT AND THEREAFTER DISTILLING THE W-AMINOCAPRONITRILE FROM THE REMAINDER OF SAID MIXTURE.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |