US3055966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous material separator and method of making separator
Assignee: Tudor AB
•
Filing: 1959-12-17
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Granted: 1962-09-25
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Expires: 1979-12-17
Abstract
No abstract record available.
Inventors
- 👤 Sundberg Erik Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:50
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/489; H01M50/491; H01M50/409; H01M50/411; H01M50/414; H01M50/417; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A COMPOSITION OF MATTER FOR USE IN MAKING A MICROPOROUS SHEET-LIKE MATERIAL COMPRISING A NON-POLAR RESINOUS POLYOLEFIN POLYMER, AN INORGANIC SALT, AND A SWELLABLE MATERIAL CAPABLE OF SWELLING UPON CONTACT WITH A SOLVENT LIQUID WHEN APPLIED TO SAID MIXTURE TO LEACH SAID INORGANIC SALT FROM SAID COMPOSITION OF MATTER.
References Cited (Backward Citations)
US2138712A
Cited
US2676929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |