US3294757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adiabatic, solid state polymerization of lactams
Assignee: Polymer Corp
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Filing: 1963-04-12
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Granted: 1966-12-27
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Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Richard O Church
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:48
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/09; B29K; B29K2077/00; Y; Y10; Y10S; Y10S264/00; Y10S264/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN AUTOGENOUS AND SUBSTANTIALLY ADIABATIC PROCESS FOR THE CONTINUOUS CONVERSION OF A HIGHER LACTAM INTO AN ELONGATED, SUBSTANTIALLY UNIFORM CROSS SECTIONED SHAPE OF POLYLACTAM BY UTILIZING LOW TEMPERATURE ANIONIC POLYMERIZATION PROCESSES CONDUCTED BELOW THE MELTING POINT OF THE POLYLACTAM SHAPE COMPRISING THE STEPS OF: (1) CONTINUOUSLY INTRODUCING INTO A FIRST zONE OF A FORMING TUBE A POLYMERIZABLE MIXTURE COMPRISED OF A HIGHER LACTAM AND A CATALYST AND A PROMOTER FOR THE LOW TEMPERATURE ANIONIC POLYMERIZATION THEREOF WHILE SAID MIXTURE IS HEATED ABOVE THE MELTING POINT OF SAID HIGHER LACTAM BUT BELOW THE TEMPERATURE AT WHICH THE RAPID POLYMERIZATION OF SAID LACTAM WILL BE INITIATED; (2) CONTINUOUSLY ADVANCING SAID POLYMERIZABLE MIXTURE FROM SAID FIRST ZONE TO A SECOND ZONE WITHIN SAID FORMING TUBE; (3) INITIALLY HEATING A PORTION OF SAID POLYMERIZABLE MIXTURE TO A TEMPERATURE THAT WILL INITIATE THE RAPID POLYMERIZATION OF SAID PORTION AND THEN DISCONTINUING SAID HEATING
Claim 2
Dependent Claim
148 words
AN AUTOGENOUS AND SUBSTANTIALLY ADIABATIC PROCESS FOR THE CONTINUOUS CONVERSION OF A HIGHER LACTAM INTO AN ELONGATED, SUBSTANTIALLY UNIFORM CROSS SECTIONED SHAPE OF POLYLACTAM BY UTILIZING LOW TEMPERATURE ANIONIC POLYMERIZATION PROCESSES CONDUCTED BELOW THE MELTING POINT OF THE POLYLACTAM SHAPE COMPRISING THE STEPS OF: (1) CONTINUOUSLY INTRODUCING INTO A FIRST zONE OF A FORMING TUBE A POLYMERIZABLE MIXTURE COMPRISED OF A HIGHER LACTAM AND A CATALYST AND A PROMOTER FOR THE LOW TEMPERATURE ANIONIC POLYMERIZATION THEREOF WHILE SAID MIXTURE IS HEATED ABOVE THE MELTING POINT OF SAID HIGHER LACTAM BUT BELOW THE TEMPERATURE AT WHICH THE RAPID POLYMERIZATION OF SAID LACTAM WILL BE INITIATED; (2) CONTINUOUSLY ADVANCING SAID POLYMERIZABLE MIXTURE FROM SAID FIRST ZONE TO A SECOND ZONE WITHIN SAID FORMING TUBE; (3) INITIALLY HEATING A PORTION OF SAID POLYMERIZABLE MIXTURE TO A TEMPERATURE THAT WILL INITIATE THE RAPID POLYMERIZATION OF SAID PORTION AND THEN DISCONTINUING SAID HEATING
References Cited (Backward Citations)
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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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |