US2952675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering epsilon-caprolactam from its polymer
Assignee: INVENTA A G fur FORSCHUN und P
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Filing: 1958-07-01
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Granted: 1960-09-13
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Expires: 1978-07-01
Abstract
No abstract record available.
Inventors
- 👤 Bolle Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:24
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR RECOVERING EPSILON-CAPROLACTAM FROM ITS EQUILIBRIUM POLYMER, WHICH COMPRISES FEEDING THE POLYMER INTO A THIN LAYER SURFACE VAPORIZER WHILE PASSING AN INERT CARRIER GAS IN SAID VAPORIZER TO VAPORIZE THE EPSILON-CAPROLACTAM AND TO CARRY IT ALONG WITH SAID GAS, AND INTRODUCING AN AQUEOUS MEDIUM INTO THE INERT GAS CONTAINING THE VAPORIZED EPSION-CAPROLACTAM TO WASH THE EPSILON-CAPROLACTAM OUT OF THE INERT GAS GY CONDENSING THE EPSILON-CAPROLACTAM AND DISSOLVING THE CONDENSED EPSILON-CAPROLACTAM IN THE WATER.
Claim 2
Dependent Claim
75 words
A PROCESS FOR RECOVERING EPSILON-CAPROLACTAM FROM ITS EQUILIBRIUM POLYMER, WHICH COMPRISES FEEDING THE POLYMER INTO A THIN LAYER SURFACE VAPORIZER WHILE PASSING AN INERT CARRIER GAS IN SAID VAPORIZER TO VAPORIZE THE EPSILON-CAPROLACTAM AND TO CARRY IT ALONG WITH SAID GAS, AND INTRODUCING AN AQUEOUS MEDIUM INTO THE INERT GAS CONTAINING THE VAPORIZED EPSION-CAPROLACTAM TO WASH THE EPSILON-CAPROLACTAM OUT OF THE INERT GAS GY CONDENSING THE EPSILON-CAPROLACTAM AND DISSOLVING THE CONDENSED EPSILON-CAPROLACTAM IN THE WATER.
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) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |