US3401152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyelectrolytes from bis sulfonium salts
Assignee: Dow Chemical Co
•
Filing: 1966-11-03
•
Granted: 1968-09-10
•
Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Ritchie A Wessling
- 👤 Ray G Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A WATER-SOLUBLE POLYECTROLYTE HAVING RECURRING UNITS OF THE STRUCTURE
Claim 2
Dependent Claim
9 words
A WATER-SOLUBLE POLYECTROLYTE HAVING RECURRING UNITS OF THE STRUCTURE
References Cited (Backward Citations)
US3110687A
Cited
US3238276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |