US3048537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous articles of polyethylene polymers and process of making the same
Assignee: Pall Corp
•
Filing: 1958-01-06
•
Granted: 1962-08-07
•
Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 David B Pall
- 👤 Krakauer Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1638; B01D39/1653; B01D39/1661; C; C08; C08J; C08J9/00; C08J9/24; B01D2239/00; B01D2239/10; Y; Y10; Y10S; Y10S521/00; Y10S521/919; Y10T; Y10T428/00; Y10T428/21; Y10T428/215; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249987; Y10T428/249988
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A FLUID-PERMEABLE ARTICLE OF LOW DENSITY POLYETHYLENE COMPRISNG INTERCONNECTED AGGREGATES OF SINTERED POLYETHYLENE PARTICLES, THE AGGREGAES DEFINING OPEN SPACES INTERCOMMUNICATING TO DEFINE PORES OF MICROSCOPIC DIMENSIONS EXTENDING FROM SURFACE TO SURFACE AND UNIFORMLY DISTRIBUTED FROM SURFACE TO SURFACE OF THE ARTICLE FOR FLOW THERETHROUGH OF FLUID, THE ARTICLE THEREBY CONSTITUTING A MASS UNIFORM IN POROSITY FROM SURFACE TO SURFACE AND HAVING A HIGH TENSILE STRENGTH AND FLOW CAPACITY RELATIVE TO ITS VOIDS CONTENT AND PORE SIZE.
Claim 2
Dependent Claim
76 words
A FLUID-PERMEABLE ARTICLE OF LOW DENSITY POLYETHYLENE COMPRISNG INTERCONNECTED AGGREGATES OF SINTERED POLYETHYLENE PARTICLES, THE AGGREGAES DEFINING OPEN SPACES INTERCOMMUNICATING TO DEFINE PORES OF MICROSCOPIC DIMENSIONS EXTENDING FROM SURFACE TO SURFACE AND UNIFORMLY DISTRIBUTED FROM SURFACE TO SURFACE OF THE ARTICLE FOR FLOW THERETHROUGH OF FLUID, THE ARTICLE THEREBY CONSTITUTING A MASS UNIFORM IN POROSITY FROM SURFACE TO SURFACE AND HAVING A HIGH TENSILE STRENGTH AND FLOW CAPACITY RELATIVE TO ITS VOIDS CONTENT AND PORE SIZE.
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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) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |