US4039170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of continuous dustless mixing and aerating and a method combining materials
Assignee: Individual
•
Filing: 1975-09-08
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Granted: 1977-08-02
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Expires: 1995-09-08
Abstract
Abstract This invention consists of a method of continuous dustless mixing and aerating of cementitious compositions and a mechanical arrangement for conveying and combining materials.
Inventors
- 👤 Charles E. Cornwell
- 👤 Mark Plunguian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:52
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; A; A62; A62C; A62C5/00; B; B28; B28C; B28C5/00; B28C5/003; B28C9/00; B28C9/002; B28C9/004; C04B28/06; E; E01; E01C; E01C23/00; E01C23/16; E01C23/20; E01C23/22; E01F; E01F9/00; E01F9/50; E01F9/506; C04B2103/00; C04B2103/30; C04B2103/302; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/00577; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A continuous process for the production of cementitious compositions comprising the steps of simultaneously supplying separate flows of water and a blend of dry cement and aggregate to a common junction where the flows are intermixed into a common flow upon coming in contact; moving the common flow through a path containing a series of angularly disposed baffles causing a turbulence and uniform mixing of the combined flows; further comprising adding a flow of preformed foam to the flow of mixed cementitious composition and conveying the final combined flows to a discharge nozzle.
Claim 2
Dependent Claim
93 words
A continuous process for the production of cementitious compositions comprising the steps of simultaneously supplying separate flows of water and a blend of dry cement and aggregate to a common junction where the flows are intermixed into a common flow upon coming in contact; moving the common flow through a path containing a series of angularly disposed baffles causing a turbulence and uniform mixing of the combined flows; further comprising adding a flow of preformed foam to the flow of mixed cementitious composition and conveying the final combined flows to a discharge nozzle.
Claim 3
Dependent Claim
25 words
The process of production of claim 1 wherein the cement is selected from the group consisting of portland cement, calcium aluminate cement, and gypsum cement.
Claim 4
Dependent Claim
32 words
The process of production of claim 1 wherein cement additives are admixed to the cementitious composition, such additives being selected from the group of materials comprising curing accelerators, retarders, and water reducers.
References Cited (Backward Citations)
US1373829A
Cited
US3237805A
Cited
US3343818A
Cited
US3685807A
Cited
US3620231A
Cited
US3827888A
Cited
US3819157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |