Patent US3297734A successfully refreshed from Google Patents.
US3297734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of sulfonated monomers
Assignee: Dow Chemical Co
•
Filing: 1963-11-04
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Granted: 1967-01-10
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 Armen Ardy
- 👤 John H Hennes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:09
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C08; C08F; C08F28/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE METHOD FOR PURIFYING A POLYMERIZABLE ETHYLENICALLY UNSATURATED SULFONATED MONOMER OF THE STRUCTURAL FORMULA SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Independent Claim
20 words
THE METHOD FOR PURIFYING A POLYMERIZABLE ETHYLENICALLY UNSATURATED SULFONATED MONOMER OF THE STRUCTURAL FORMULA SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |