US3880740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cultivation of epsilon-caprolactam-utilizing microorganism
Assignee: Asahi Kasei Corp
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Filing: 1973-08-31
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Granted: 1975-04-29
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Expires: 1993-08-31
Abstract
Abstract A strain of the novel species Pseudomonas lactamolyticus (NRRL B-5749), which has an ability of utilizing Epsilon -caprolactam as sole carbon and nitrogen sources, is cultured in a culturing medium under aerobic conditions. The process is useful for a treatment of polyamide plant waste liquor which contains Epsilon -caprolactam, whereby the waste liquor is decreased in BOD and this is purified.
Inventors
- 👤 Akio Mimura
- 👤 Shiro Hayakawa
- 👤 Takashi Iguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/34; C02F1/00; C02F1/52; C02F1/5236; C12; C12N; C12N1/00; C12N1/02; C12N1/20; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/824; Y10S435/843; Y10S435/874; Y10S435/875
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
A PROCESS FOR THE REMOVAL OF E-CAPROLACTAM FROM WASTE LIQUOR CONTAINING IT AT A CONCENTRATION OF FROM 0.1 PERCENT TO 4 PERCENT BY WEIGHT WHICH COMPRISES AEROBICALLY CULTURING PSEUDOMONAS LACTAMOLYTICUS NRRL B-5749 IN SAID WASTE LIQUOR.
Claim 2
Dependent Claim
36 words
A PROCESS FOR THE REMOVAL OF E-CAPROLACTAM FROM WASTE LIQUOR CONTAINING IT AT A CONCENTRATION OF FROM 0.1 PERCENT TO 4 PERCENT BY WEIGHT WHICH COMPRISES AEROBICALLY CULTURING PSEUDOMONAS LACTAMOLYTICUS NRRL B-5749 IN SAID WASTE LIQUOR.
Claim 3
Dependent Claim
15 words
A process as in claim 1 wherein the waste liquor source is a polyamide plant.
Claim 4
Dependent Claim
18 words
A process as in claim 1 wherein the epsilon -caprolactam concentration is from 0.2 percent to 4 percent.
Claim 5
Dependent Claim
11 words
A process as in claim 1 including recovering the microbial cells.
Claim 6
Dependent Claim
15 words
A process according to claim 1, wherein a nitrogen source is supplemented to the medium.
Claim 7
Dependent Claim
24 words
A process according to claim 1, wherein the culturing is effected at a temperature of 18* to 37*C. and pH of 5 to 9.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |