US3119704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aerated cementitious products
Assignee: Dow Chemical Co
•
Filing: 1961-12-04
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Granted: 1964-01-28
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Bob R Harrell
- 👤 James A Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/38; B28C5/381; Y; Y10; Y10S; Y10S366/00; Y10S366/604
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF PRODUCING A LIGH WEIGHT, CELULAR CEMENT PRODUCT WHICH COMPRISES PROVIDING A CEMENTITIOUS SLURRY AND AN INERT GAS, PROVIDING AN ELONGATED TUBE, INJECTING SAID INERT GAS AND CEMENTITIOUS SLURRY INTO SAID ELONGATED TUBE AT A COMBINED FLOW VELOCITY OF FROM 0.15 TO 3.0 FEET PER SECOND, SAID TUBE HAVING FROM 8 TO 40 CHANGES OF DIRECTION OF ABOUT 180 DEGREES AND ADDITIONAL RESISTANCE TO FLOW SUCH THAT A PRESSURE DROP IN THE RANGE OF 5 TO 24 POUNDS PER SQUARE INCH IS OBTAINED DUE TO CHANGES IN VELOCITY AND DIRECTION OF FLOW WITHIN THE TUBE, AND REMOVING LIGHT WEIGHT, CELULAR CEMENT PRODUCT FROM SAID TUBE.
Claim 2
Independent Claim
107 words
A METHOD OF PRODUCING A LIGH WEIGHT, CELULAR CEMENT PRODUCT WHICH COMPRISES PROVIDING A CEMENTITIOUS SLURRY AND AN INERT GAS, PROVIDING AN ELONGATED TUBE, INJECTING SAID INERT GAS AND CEMENTITIOUS SLURRY INTO SAID ELONGATED TUBE AT A COMBINED FLOW VELOCITY OF FROM 0.15 TO 3.0 FEET PER SECOND, SAID TUBE HAVING FROM 8 TO 40 CHANGES OF DIRECTION OF ABOUT 180 DEGREES AND ADDITIONAL RESISTANCE TO FLOW SUCH THAT A PRESSURE DROP IN THE RANGE OF 5 TO 24 POUNDS PER SQUARE INCH IS OBTAINED DUE TO CHANGES IN VELOCITY AND DIRECTION OF FLOW WITHIN THE TUBE, AND REMOVING LIGHT WEIGHT, CELULAR CEMENT PRODUCT FROM SAID TUBE.
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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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |