US3718561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poromeric polymeric products and process therefor
Assignee: Individual
•
Filing: 1970-07-07
•
Granted: 1973-02-27
•
Expires: 1990-07-07
Abstract
Abstract The present invention shows how to make poromeric polymeric products by leaching out water-soluble electrolytes from a polymeric material with the help of galvanic or electrolytic current.
Inventors
- 👤 E Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
The process of producing a poromeric sheet material by milling and otherwise incorporating 100 to 500 parts of a dry electrolyte in powdered form into a polymeric matrix, attaching said matrix to a metal plate, passing a current from this plate to a plate of dissimilar metal on the opposite side of said matrix while held submerged in a water bath to which 5 percent of a dissimilar electrolyte has been added, removing the now poromeric matrix from the plate to which it had been attached.
Claim 2
Dependent Claim
64 words
The process of producing a poromeric sheet material by incorporating 100 to 500 parts of sodium chloride into a plastic matrix, forming a sheet from this mixture, leaching out the sodium chloride from said sheet while said sheet is held in stretched condition in a water bath, with the concurrent application of electrical currents through the sheet from one surface to the opposite surface.
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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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |