Patent US6607544B1 successfully refreshed from Google Patents.
Patent US3308073A successfully refreshed from Google Patents.
US3308073A
Expired / Lapsed
US
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Porous polyolefin objects
Assignee: Phillips Petroleum Co
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Filing: 1962-04-09
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Granted: 1967-03-07
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 James E Kepple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0502; C08J2201/052; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S264/00; Y10S264/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A POROUS POLYMERIC OBJECT PREPARED BY BLENDING A NORMALLY SOLID POLYMER OF A MONOOLEFINIC COMPOUND AND A NORMALLY LIQUID HYDROCARBON HAVING A BOILING POINT ABOVE THE SOFTENING POINT OF SAID POLYMER AT A TEMPERATURE ABOVE THE SOFTENING POINT OF SAID POLYMER BUT BELOW THE BOILING POINT OF SAID NORMALLY LIQUID HYDROCARBON, COOLING THE RESULTANT BLEND BELOW THE SOLIDIFICATION POINT OF SAID POLYMER AND THEREAFTER REMOVING SUBSTANTIALLY ALL OF SAID LIQUID HYDROCARBON BY EVAPORATION SO AS TO FORM A POROUS POLYMERIC OBJECT.
Claim 2
Dependent Claim
81 words
A POROUS POLYMERIC OBJECT PREPARED BY BLENDING A NORMALLY SOLID POLYMER OF A MONOOLEFINIC COMPOUND AND A NORMALLY LIQUID HYDROCARBON HAVING A BOILING POINT ABOVE THE SOFTENING POINT OF SAID POLYMER AT A TEMPERATURE ABOVE THE SOFTENING POINT OF SAID POLYMER BUT BELOW THE BOILING POINT OF SAID NORMALLY LIQUID HYDROCARBON, COOLING THE RESULTANT BLEND BELOW THE SOLIDIFICATION POINT OF SAID POLYMER AND THEREAFTER REMOVING SUBSTANTIALLY ALL OF SAID LIQUID HYDROCARBON BY EVAPORATION SO AS TO FORM A POROUS POLYMERIC OBJECT.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |