US3841886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory cement incorporating fluxing component
Assignee: Motus Chemicals Inc
•
Filing: 1972-12-15
•
Granted: 1974-10-15
•
Expires: 1992-12-15
Abstract
Abstract Refractory properties are imparted to a cement prepared from non-refractory CaSO4 by incorporation of a primary fluxing component and grog. The composition can be formulated for various uses, e.g., as a structural board, as a castable material for forming a refractory mass and as an oil well casing cement.
Inventors
- 👤 H Burr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B28/00; C04B28/14; C04B32/00; C04B32/005; C04B33/00; C04B33/02; C04B35/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A STRUCTURAL MEMBER, COMPRISING, EXCLUSIVE OF H2O, ABOUT 60-90 WEIGHT PERCENT CALCIUM SULFIATE AND ABOUT 40-10 WEIGHT PERCENT FLUX AND GROG MATERIAL, SAID CALCIUM SULFATE CONTAINING WATER OF HYDRATION, SAID FLUX AND GROG MATERIAL COMPRISING ABOUT 0.2 TO ABOUT 50 WEIGHT PERCENT PRIMARY FLUXING COMPONENT AND ABOUT 99.8 TO ABOUT 50 WEIGHT PERCENT GROG COMPONENT, AND AN AMOUNT OF H2O SUFFICIENT TO FORM SAID STRUCTURAL BOARD, SAID FLUXING COMPONENT BEING PERCENT IN SUFFICIENT AMOUNT TO PROVIDE AT LAST 2 WEIGHT PERCENT BASED ON THE CONTENT OF SAID CALCIUM SULFATE IN AID COMPOSITION.
Claim 2
Dependent Claim
92 words
A STRUCTURAL MEMBER, COMPRISING, EXCLUSIVE OF H2O, ABOUT 60-90 WEIGHT PERCENT CALCIUM SULFIATE AND ABOUT 40-10 WEIGHT PERCENT FLUX AND GROG MATERIAL, SAID CALCIUM SULFATE CONTAINING WATER OF HYDRATION, SAID FLUX AND GROG MATERIAL COMPRISING ABOUT 0.2 TO ABOUT 50 WEIGHT PERCENT PRIMARY FLUXING COMPONENT AND ABOUT 99.8 TO ABOUT 50 WEIGHT PERCENT GROG COMPONENT, AND AN AMOUNT OF H2O SUFFICIENT TO FORM SAID STRUCTURAL BOARD, SAID FLUXING COMPONENT BEING PERCENT IN SUFFICIENT AMOUNT TO PROVIDE AT LAST 2 WEIGHT PERCENT BASED ON THE CONTENT OF SAID CALCIUM SULFATE IN AID COMPOSITION.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein said flux and grog material comprises substantially separately mixed primary flux and grog.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein said flux and grog material comprise substantially a natural mineral having both flux and grog properties.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said flux is a metal compound having a fusion point below 1,450*C when fired with calcium sulfate.
Claim 6
Dependent Claim
66 words
The composition of claim 1 in which said flux is a compound selected from the oxides and carbonates of a metal from periodic groups IA, IB, IIB, IVA, IVB, VIIB and VIII, and any other inorganic compound of a metal from periodic groups IA, IB, IIA, IIB, IVA, IVB, VIIB and VIII, wherein said compound has a fusion point below 1,450*C when fired with calcium sulfate.
Claim 7
Dependent Claim
16 words
The composition of claim 1 in which said flux is a compound of an alkali metal.
Claim 8
Dependent Claim
14 words
The composition of claim 1 in which said flux is an alkali metal oxide.
References Cited (Backward Citations)
US2313085A
Cited
US2420863A
Cited
US3376147A
Cited
US3445323A
Cited
US3616173A
Cited
US3591393A
Cited
US3676164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |