US3047565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extraction of monomeric caprolactam from its polymer
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1959-11-18
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Granted: 1962-07-31
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Expires: 1979-11-18
Abstract
No abstract record available.
Inventors
- 👤 Braun Wilhelm
- 👤 Zehnder Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:54
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/46; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PROCESS FOR THE RECOVERY OF VOLATILE MONOMERIC CAPROLACYAM ENTRINED IN A STREAM OF INERT GAS, WHICH COMPRISES BRINGING SAID GAS STREAM IN CONTACT WITH LIQUID MONOMERIC CAPROLACTAM WHICH ACTS AS SOLVENT FOR SAID ENTRAAINED CAPROLACTAM.
Claim 2
Dependent Claim
36 words
A PROCESS FOR THE RECOVERY OF VOLATILE MONOMERIC CAPROLACYAM ENTRINED IN A STREAM OF INERT GAS, WHICH COMPRISES BRINGING SAID GAS STREAM IN CONTACT WITH LIQUID MONOMERIC CAPROLACTAM WHICH ACTS AS SOLVENT FOR SAID ENTRAAINED CAPROLACTAM.
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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |