US3226459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quenching of polyolefin film
Assignee: Union Carbide Corp
•
Filing: 1962-10-03
•
Granted: 1965-12-28
•
Expires: 1982-10-03
Abstract
No abstract record available.
Inventors
- 👤 Tijunelis Donatas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/918; B29C48/9185; B29C48/03; B29C48/09; B29C48/10; B29C48/885; B29C48/911; B29C48/9115; B29C48/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PRODUCING A POLYOLEFIN FILM HAVING IMPROVED OPTICAL PROPERTIES COMPRISING: (A) EXTRUDING AN OLEFIN POLYMER THROUGH AN EXTRUSION DIE SO AS TO FORM A FILM THEREOF; (B) PASSING THE EXTRUDED FILM OVER A SOLID COOLING SURFACE LOCATED BETWEEN SAID EXTRUSION DIE AND THE FROST LINE OF SAID FILM; (C) MAINTAINING THE DEW POINT OF THE ATMOSPHERE SURROUNDING SAID SOLID COOLING SURFACE AT AT LEAST 0*C. BY SUPPLYING HUMID AIR TO THE REGION AROUND SAID SOLID COOLING SURFACE; AND (D) PROVIDING LUBRICATION BETWEEN SAID FILM AND SAID COOLING SURFACE BY MAINTAINING SAID COOLING SURFACE AT A TEMPERATURE BELOW THE DEW POINT OF THE SURROUNDING ATMOSPHERE SO THAT MOISTURE CONDENSES ON SAID SURFACE FROM SAID ATMOSPHERE.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PRODUCING A POLYOLEFIN FILM HAVING IMPROVED OPTICAL PROPERTIES COMPRISING: (A) EXTRUDING AN OLEFIN POLYMER THROUGH AN EXTRUSION DIE SO AS TO FORM A FILM THEREOF; (B) PASSING THE EXTRUDED FILM OVER A SOLID COOLING SURFACE LOCATED BETWEEN SAID EXTRUSION DIE AND THE FROST LINE OF SAID FILM; (C) MAINTAINING THE DEW POINT OF THE ATMOSPHERE SURROUNDING SAID SOLID COOLING SURFACE AT AT LEAST 0*C. BY SUPPLYING HUMID AIR TO THE REGION AROUND SAID SOLID COOLING SURFACE; AND (D) PROVIDING LUBRICATION BETWEEN SAID FILM AND SAID COOLING SURFACE BY MAINTAINING SAID COOLING SURFACE AT A TEMPERATURE BELOW THE DEW POINT OF THE SURROUNDING ATMOSPHERE SO THAT MOISTURE CONDENSES ON SAID SURFACE FROM SAID ATMOSPHERE.
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |