Patent US2691639A successfully refreshed from Google Patents.
US2691639A
Expired / Lapsed
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Water-dispersible molding compositions and articles prepared therefrom
Assignee: Dow Chemical Co
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Filing: 1952-02-07
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Granted: 1954-10-12
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Expires: 1972-02-07
Abstract
No abstract record available.
Inventors
- 👤 Harold H Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A SOLID, THERMOPLASTIC COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF AT LEAST ONE SUBSTANTIALLY NEUTRAL SALT OF A SULPHONATED THERMOPLASTIC RESIN, WHICH RESIN IS A POLYMER OF AN ALKENYL AROMATIC COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
35 words
A SOLID, THERMOPLASTIC COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF AT LEAST ONE SUBSTANTIALLY NEUTRAL SALT OF A SULPHONATED THERMOPLASTIC RESIN, WHICH RESIN IS A POLYMER OF AN ALKENYL AROMATIC COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2533211A
Cited
US2533210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |