Patent US4378249A successfully refreshed from Google Patents.
US4378249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gel forming compositions
Assignee: Fosroc International Ltd
•
Filing: 1981-10-22
•
Granted: 1983-03-29
•
Expires: 2001-10-22
Abstract
Abstract A substantially dry powder composition which when mixed with water forms a gel comprises a swelling clay, a sodium silicate having a silica to soda weight ratio of about 2.65:1 or below and an inorganic gelling agent for the sodium silicate which gelling agent does not introduce ions which significantly lower the gelling capacity of the clay. The composition is particularly suitable for use in coal mines as an anti-combustion material.
Inventors
- 👤 James Beale
- 👤 Robert F. Viles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:38
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C09; C09K; C09K21/00; C09K21/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A substantially dry powder composition which when mixed with water forms a gel which remains deformable and resilient and is not converted to a solid mass consisting essentially of 50-90% by weight of a swelling clay, 2-50% by weight of a sodium silicate having a silica to soda weight ratio of about 2.65:1 or below and 0.1-20% by weight of an inorganic gelling agent for the sodium silicate selected from the group consisting of silicofluorides, calcium silicates and calcium sulphate.
Claim 2
Dependent Claim
80 words
A substantially dry powder composition which when mixed with water forms a gel which remains deformable and resilient and is not converted to a solid mass consisting essentially of 50-90% by weight of a swelling clay, 2-50% by weight of a sodium silicate having a silica to soda weight ratio of about 2.65:1 or below and 0.1-20% by weight of an inorganic gelling agent for the sodium silicate selected from the group consisting of silicofluorides, calcium silicates and calcium sulphate.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein the clay is montmorillonite or attapulgite.
Claim 4
Dependent Claim
23 words
A composition according to claim 1 or claim 2 wherein the clay is a natural sodium bentonite or a treated natural calcium bentonite.
Claim 5
Dependent Claim
18 words
A composition according to claim 1 wherein the silica to soda ratio of the sodium silicate is 2.0:1.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 wherein the silicofluoride is sodium silicofluoride, potassium silicofluoride or magnesium silicofluoride.
Claim 7
Dependent Claim
16 words
A composition according to claim 1 wherein the calcium silicate is dicalcium silicate or portland cement.
Claim 8
Dependent Claim
11 words
A composition according to claim 1 containing in addition sodium carbonate.
Claim 9
Dependent Claim
20 words
A composition according to claim 1 consisting essentially of by weight: 65-85% swelling clay 5-30% sodium silicate 2-15% gelling agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |