US3785838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic refractory fibrous compositions
Assignee: EIDP Inc
•
Filing: 1971-11-04
•
Granted: 1974-01-15
•
Expires: 1991-11-04
Abstract
Abstract Inorganic fibers such as mineral wool are bonded in a coherent mass with a binder such as colloidal positively charged particles having a silica core and a coating of a polyvalent metal-oxygen compound. The binder is flocculated from solution onto the fibers by agents such as attapulgite or hectorite. These inorganic structures retain their strength at temperatures as high as 2300*F.
Inventors
- 👤 V Weidman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:21
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
34 words
The composition of claim 1 wherein the binder is a sol of particles having a silica core coated with at least one of oxides, hydroxides, and hydrated oxides of aluminum, chromium, titanium and zirconium.
Claim 2
Dependent Claim
17 words
The composition of claim 2 wherein the ratio of binder to flocculent is from 2:3 to 4:3.
Claim 3
Dependent Claim
26 words
The composition of claim 2 having from 75 to 90 parts by weight inorganic refractory fibers and 10 to 25 parts by weight binder plus flocculent.
Claim 4
Dependent Claim
10 words
The composition of claim 4 wherein the flocculent is montmorillonite.
Claim 5
Dependent Claim
15 words
The composition of claim 2 wherein the flocculent is a mixture of montmorillonite and saponite.
Claim 6
Dependent Claim
96 words
In a process for binding inorganic refractory fibers with a binder selected from the group consisting of (A) positively charged colloidal particles having a silica core coated with at least one of oxides, hydroxides and hydrated oxides of aluminum, chromium, titanium and zirconium, (B) boehmite alumina, (C) fumed alumina and (D) basic aluminum chloride wherein the fibers and binder are slurried together and then filtered by vacuum forming to form a refractory object, the improvement comprising flocculating the binder onto the fibers with a flocculent selected from thE group consisting of montmorillonite, attapulgite, saponite and hectorite.
Claim 7
Dependent Claim
35 words
A process according to claim 7 wherein the binder is a sol of particles having a silica core coated with at least one of oxides, hydroxides and hydrated oxides of aluminum, chromium, titanium and zirconium.
Claim 8
Dependent Claim
18 words
A process according to claim 7 wherein the ratio of binder to flocculent is from 2:3 to 4:3.
Claim 9
Dependent Claim
27 words
A process according to claim 7 having from 75 to 90 parts by weight inorganic refractory fibers and 10 to 25 parts by weight binder plus flocculent.
Claim 10
Dependent Claim
11 words
A process according to claim 10 wherein the flocculent is montmorillonite.
Claim 11
Dependent Claim
16 words
A process according to claim 7 wherein the flocculent is a mixture of montmorillonite and saponite.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |