Patent US4363480A successfully refreshed from Google Patents.
Patent US4515849A successfully refreshed from Google Patents.
Patent US3287480A successfully refreshed from Google Patents.
US3287480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pelletizing plastics
Assignee: Hexion Inc
•
Filing: 1964-03-31
•
Granted: 1966-11-22
•
Expires: 1984-03-31
Abstract
No abstract record available.
Inventors
- 👤 Wechsler Harry
- 👤 Milton W Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:12
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/10; B29B9/08; B01; B01J; B01J2/00; B01J2/20; B29B9/02; B29B9/06; B30; B30B; B30B11/00; B30B11/20; B30B11/201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN COMPOUNDING A POWDERED RESIN SELECTED FROM A GROUP CONSISTING OF POLYVINYL CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE AND AN ETHENOID COMONOMER WITH A CHEMICALLY INERT, SUBSTANTIALLY NON-VOLATILE LIQUID SOLVENT SERVING AS A PLASTICIZER FOR THE RESIN, THE PROCESS WHICH COMPRISES: (1) FORMING A MIXTURE, IN DRY FORM, OF ABOUT 100 PARTS OF SAID RESIN AND 5-60 PARTS OF THE PLASTICIZER, (2) COMPRESSING SAID MIXTURE, AT A TEMPERATURE OF INCIPIENT FUSION OF SAID RESIN IN CONTACT WITH SAID PLASTICIZER, INTO SHAPE-RETAINING PELLETS THAT HAVE AN OVERALL BULK DENSITY AT LEAST ABOUT 1/5 HIGHER THAN SAID MIXTURE BEFORE SAID COMPRESSION, AND (3) HEATING SAID PELLETS AT A TEMPERATURE OF FLUXING UNTIL THE RESULTING MASS IS SUBSTANTIALLY UNIFORM.
Claim 2
Dependent Claim
116 words
IN COMPOUNDING A POWDERED RESIN SELECTED FROM A GROUP CONSISTING OF POLYVINYL CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE AND AN ETHENOID COMONOMER WITH A CHEMICALLY INERT, SUBSTANTIALLY NON-VOLATILE LIQUID SOLVENT SERVING AS A PLASTICIZER FOR THE RESIN, THE PROCESS WHICH COMPRISES: (1) FORMING A MIXTURE, IN DRY FORM, OF ABOUT 100 PARTS OF SAID RESIN AND 5-60 PARTS OF THE PLASTICIZER, (2) COMPRESSING SAID MIXTURE, AT A TEMPERATURE OF INCIPIENT FUSION OF SAID RESIN IN CONTACT WITH SAID PLASTICIZER, INTO SHAPE-RETAINING PELLETS THAT HAVE AN OVERALL BULK DENSITY AT LEAST ABOUT 1/5 HIGHER THAN SAID MIXTURE BEFORE SAID COMPRESSION, AND (3) HEATING SAID PELLETS AT A TEMPERATURE OF FLUXING UNTIL THE RESULTING MASS IS SUBSTANTIALLY UNIFORM.
References Cited (Backward Citations)
US2567274A
Cited
US3004294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |