Patent US2354325A successfully refreshed from Google Patents.
Patent US3129195A successfully refreshed from Google Patents.
US3129195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of unsaturated aldehydes and-so3-containing monomers and their preparation
Assignee: Shell USA Inc
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Filing: 1962-02-08
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Granted: 1964-04-14
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Ronald K June
- 👤 Benedictis Aldo De
- 👤 Paul H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:58
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/18; C08G2/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
A WATER SOLUBLE COPOLYMER OF AN ALPHA,BETAETHYLENICALLY UNSATURATED ALDEHYDE AND A WATER SOLUBLE SALT OF AN ETHYLENICALLY UNSATURATED SULFONIC ACID.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |