US3793269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wallboard tape joint composition employing a water-soluble polymeric binder containing polyacrylamide,cellulose ether,limestone,mica and asbestos
Assignee: Dow Chemical Co
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Filing: 1972-07-21
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Granted: 1974-02-19
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Expires: 1992-07-21
Abstract
Abstract DESIRABLE WALLBOARD TAPE JOINT COMPOSITIONS COMPRISE A CONVENTIONAL MINERAL FILLER MIXTURE, SUCH AS FINELY GROUND LIMESTONE, MICA AND ASBESTOS, INTIMATELY MIXED WITH A CONDITIONER, SUCH AS A WATER-SOLUBLE CELLULOSE ETHER, AND CONTAINING AS THE BINDER A POLYACRYLAMIDE HAVING A CONTROLLED DEGREE OF HYDROLYSIS AND VISCOSITY CHARACTERISTICS.
Inventors
- 👤 F Bruschtein
- 👤 D Lyftogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:23
CPC Classifications
C; C09; C09J; C09J1/00
Claims Analysis
Total Claims: 0
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |