Patent US3721637A successfully refreshed from Google Patents.
US3721637A
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US
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Method for dispersing asbestos fibers
Assignee: Individual
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Filing: 1971-11-08
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Granted: 1973-03-20
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Expires: 1991-11-08
Abstract
Abstract A METHOD FOR DISPERSING ASBESTOS FIBERS EMPLOYING LOW CONCENTRATIONS OF SELECTED ACRYLIC OR METHACRYLIC ACID POLYMERS IS DESCRIBED; SAID METHOD PROVIDING DISPERSIONS BEING PARTICULARLY CHARACTERIZED BY THEIR EXCELLENT HOMOGENEITY.
Inventors
- 👤 F Schultz
- 👤 H Fogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:47
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/08; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; Y; Y10; Y10S; Y10S264/00; Y10S264/19
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |