Patent EP0495673A1 successfully refreshed from Google Patents.
US3202733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making microporous plastic
Assignee: Esb-Reeves Corp
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Filing: 1962-03-06
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Granted: 1965-08-24
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Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Howard J Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:02
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF MAKING MICROPOUS PLASTIC HAVING A FUNCTIONAL TEMPERATURE IN EXCESS OF 500*F. COMPRISING THE STEPS OF IMPREGNATING A POROUS METAL FORM WITH A FINE DISPERSION OF THE PLASTIC IN WATER, DRYING THE FORM TO REMOVE THE WATER WHILE LEAVING A RESIDE OF TH PLASTIC IN THE PORES OF THE METAL FORM, HEATING THE PLASTIC IMPREGNATED FORM TO A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO FUSE THE PLASTIC IN THE PORES OF THE METAL FORM, AND REMOVING THE METAL FROM THE PLASTIC IMPREGNATED FORM BY DISSOLUTION THEREBY PRODUCING A MICROPOROUS PLASTIC HAVING A GEOMETRIC SHAPE CORRESPONDING TO THE ORIGINAL POROUS METAL FORM AND HAVING PORE STRUCTURE CORRESPONDING IN VOLUME TO THE METAL IN THE ORIGINAL METAL FORM PLUS THE VOLUME OF THE WATER WHICH WAS REMOVED BY DRYING
Claim 2
Independent Claim
132 words
A METHOD OF MAKING MICROPOUS PLASTIC HAVING A FUNCTIONAL TEMPERATURE IN EXCESS OF 500*F. COMPRISING THE STEPS OF IMPREGNATING A POROUS METAL FORM WITH A FINE DISPERSION OF THE PLASTIC IN WATER, DRYING THE FORM TO REMOVE THE WATER WHILE LEAVING A RESIDE OF TH PLASTIC IN THE PORES OF THE METAL FORM, HEATING THE PLASTIC IMPREGNATED FORM TO A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO FUSE THE PLASTIC IN THE PORES OF THE METAL FORM, AND REMOVING THE METAL FROM THE PLASTIC IMPREGNATED FORM BY DISSOLUTION THEREBY PRODUCING A MICROPOROUS PLASTIC HAVING A GEOMETRIC SHAPE CORRESPONDING TO THE ORIGINAL POROUS METAL FORM AND HAVING PORE STRUCTURE CORRESPONDING IN VOLUME TO THE METAL IN THE ORIGINAL METAL FORM PLUS THE VOLUME OF THE WATER WHICH WAS REMOVED BY DRYING
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |