US3165505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the properties of polyethylene
Assignee: BASF SE
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Filing: 1961-11-09
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Granted: 1965-01-12
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Expires: 1981-11-09
Abstract
No abstract record available.
Inventors
- 👤 Gaeth Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:03
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/52; B29B7/56; B29B13/00; B29B7/002; B29B7/007; B29K; B29K2023/00; B29K2023/04; B29K2023/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR IMPROVING THE PROPERTIES OF SOLID POLYETHYLENE HAVING A MEAN MOLECULAR WEIGHT EXCEEDING 10,000 WHICH COMPRISES FORCING SAID POLYETHYLENE IN THE SOLID STATE THROUGH THE NIP OF A PAIR OF ROTATING ROLLERS AT A SPEED OF SAID POLYETHYLENE OF 0.5 TO 1.5 METERS PER SECOND AND A TEMPERATURE OF SAID POLYETHYLENE IN SAID NIP WHICH IS ABOVE 60*C. BUT BELOW THE MELTING POINT OF SAID POLYLETHYLENE, SAID NIP BEING NOT LARGER THAN 0.1 MM. IN WIDTH; IN WHICH NIP A MECHANICAL TURBULENCE IN THE SOLID POLYETHYLENE IS INDUCED, AND DISCHARGING THE POLYETHYLENE FROM THE NIP OF SAID ROLLERS AS SOLID, CREPED POLYETHYLENE.
Claim 2
Dependent Claim
104 words
A PROCESS FOR IMPROVING THE PROPERTIES OF SOLID POLYETHYLENE HAVING A MEAN MOLECULAR WEIGHT EXCEEDING 10,000 WHICH COMPRISES FORCING SAID POLYETHYLENE IN THE SOLID STATE THROUGH THE NIP OF A PAIR OF ROTATING ROLLERS AT A SPEED OF SAID POLYETHYLENE OF 0.5 TO 1.5 METERS PER SECOND AND A TEMPERATURE OF SAID POLYETHYLENE IN SAID NIP WHICH IS ABOVE 60*C. BUT BELOW THE MELTING POINT OF SAID POLYLETHYLENE, SAID NIP BEING NOT LARGER THAN 0.1 MM. IN WIDTH; IN WHICH NIP A MECHANICAL TURBULENCE IN THE SOLID POLYETHYLENE IS INDUCED, AND DISCHARGING THE POLYETHYLENE FROM THE NIP OF SAID ROLLERS AS SOLID, CREPED POLYETHYLENE.
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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |