US3086947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cation permselective membranes
Assignee: AGC Inc
•
Filing: 1955-07-19
•
Granted: 1963-04-23
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Kuwata Tsutomu
- 👤 Yoshikawa Sadao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:21
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2287; C08J2353/00; C08J2353/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A CATION PERMSELECTIVE MEMBRANE COMPRISING A THIN HOMOGENEOUS FILM OF A THICKNESS OF FROM 0.06 TO 0.5 MM. AND COMPRISING A SULFONATED COPOLYMER OF A MONO-VINYL AROMATIC COMPOUND AND A LINEAR ALIPHATIC POLYENE HYDROCARBON, SAID COPOLYMER CONTAINING FROM 30 TO 70% BY WEIGHT OF AROMATIC COMPOUND.
Claim 2
Dependent Claim
46 words
A CATION PERMSELECTIVE MEMBRANE COMPRISING A THIN HOMOGENEOUS FILM OF A THICKNESS OF FROM 0.06 TO 0.5 MM. AND COMPRISING A SULFONATED COPOLYMER OF A MONO-VINYL AROMATIC COMPOUND AND A LINEAR ALIPHATIC POLYENE HYDROCARBON, SAID COPOLYMER CONTAINING FROM 30 TO 70% BY WEIGHT OF AROMATIC COMPOUND.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |