US3340079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing the viscosity of magnesia cements
Assignee: Dow Chemical Co
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Filing: 1964-04-15
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Granted: 1967-09-05
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Burl E Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:14
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/30; C04B28/32; C04B2103/00; C04B2103/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR INCREASING THE VISCOSITY OF SLURRIES OF MAGNESIA CEMENTS WHICH COMPRISES TREATING A SLURRY OF THE MAGNESIA CEMENT WITH ULTRASONIC ENERGY OF A MAGNITUDE WITHIN THE RANGE OF FROM ABOUT 20 TO ABOUT 100 KILOCYCLES PER SECOND AT INTENSITIES WITHIN THE RANGE OF FROM ABOUT 25 TO ABOUT 110 WATTS PER SQUARE CENTIMETER FOR A PERIOD OF FROM ABOUT 1 TO ABOUT 30 MINUTES.
Claim 2
Independent Claim
66 words
A METHOD FOR INCREASING THE VISCOSITY OF SLURRIES OF MAGNESIA CEMENTS WHICH COMPRISES TREATING A SLURRY OF THE MAGNESIA CEMENT WITH ULTRASONIC ENERGY OF A MAGNITUDE WITHIN THE RANGE OF FROM ABOUT 20 TO ABOUT 100 KILOCYCLES PER SECOND AT INTENSITIES WITHIN THE RANGE OF FROM ABOUT 25 TO ABOUT 110 WATTS PER SQUARE CENTIMETER FOR A PERIOD OF FROM ABOUT 1 TO ABOUT 30 MINUTES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |