US3254146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for orienting polyvinyl chloride film
Assignee: EIDP Inc
•
Filing: 1962-04-26
•
Granted: 1966-05-31
•
Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Quinn James Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
C; C08; C08L; C08L27/00; B; B29; B29C; B29C55/00; B29C59/00; B65; B65D; B65D35/00; B65D35/02; C08J; C08J5/00; C08J5/18; C08L27/02; C08L27/04; C08L27/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y02; Y02A; Y02A40/00; Y02A40/90; Y02W; Y02W90/00; Y02W90/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS OF PREPARING POLYVINYL CHLORIDE FILM WHICH COMPRISES THE STEPS IN SQUENCE OF EXTRUDING A MELT CONTAINING POLYVINYL CHLORIDE RESIN AND ADDITIVES COMPRISING A HEAT-STABILIZING AGENT AT LEAST ONE OF SAID ADDITIVES HAVING PLASTICIZING PROPERTIES, THE TOTAL AMOUNT OF ADDITIVES BEING SUCH AS TO PRODUCE AN EFFECT O GREATER THAN THAT PRODUCED BY 1.5 TO 10% OF A PRIMARY PLASTICIZER FOR SAID RESIN TO FORM A FILM; ELONGATING SAID FILM IN AT LEAST ONE DIRECTION AN AMOUNT NECESSARY TO INCREASE THE PLANAR ORIENTATION NUMBER OF SAID FILM TO AT LEAST 16 WHILE HOLDING SAID FILM AT A TEMPERATURE OF 80-115*C.; AND, THEREAFTER, COOLING SAID FILM TO A TEMPERATURE BELOW 70*C. WHILE IMPOSING TENSION ON SAID FILM TO PREVENT ANY SUBSTANTIAL CHANGE IN THE FILM''S DIMENSIONS; AND THEREAFTER, RELEASING SAID TENSION.
Claim 2
Dependent Claim
131 words
A PROCESS OF PREPARING POLYVINYL CHLORIDE FILM WHICH COMPRISES THE STEPS IN SQUENCE OF EXTRUDING A MELT CONTAINING POLYVINYL CHLORIDE RESIN AND ADDITIVES COMPRISING A HEAT-STABILIZING AGENT AT LEAST ONE OF SAID ADDITIVES HAVING PLASTICIZING PROPERTIES, THE TOTAL AMOUNT OF ADDITIVES BEING SUCH AS TO PRODUCE AN EFFECT O GREATER THAN THAT PRODUCED BY 1.5 TO 10% OF A PRIMARY PLASTICIZER FOR SAID RESIN TO FORM A FILM; ELONGATING SAID FILM IN AT LEAST ONE DIRECTION AN AMOUNT NECESSARY TO INCREASE THE PLANAR ORIENTATION NUMBER OF SAID FILM TO AT LEAST 16 WHILE HOLDING SAID FILM AT A TEMPERATURE OF 80-115*C.; AND, THEREAFTER, COOLING SAID FILM TO A TEMPERATURE BELOW 70*C. WHILE IMPOSING TENSION ON SAID FILM TO PREVENT ANY SUBSTANTIAL CHANGE IN THE FILM''S DIMENSIONS; AND THEREAFTER, RELEASING SAID TENSION.
References Cited (Backward Citations)
US2952867A
Cited
US2851733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |