US4090881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature refractory adhesive
Assignee: Thermal Ceramics Inc
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Filing: 1976-06-30
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Granted: 1978-05-23
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Expires: 1996-06-30
Abstract
Abstract A high temperature non-conducting inorganic refractory adhesive suitable for use in conjunction with a number of substances including conducting elements metallic in nature.
Inventors
- 👤 David LeRoy Keel
- 👤 Richard Allen Waugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:54
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/36; C04B33/02; C04B33/13; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/185; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/6316; C04B35/66; C04B35/71; C04B35/78; C04B35/80; C04B37/00; C04B37/003; C04B37/005; C04B37/02; C04B37/023; C04B37/025; H; H05; H05B; H05B3/00; H05B3/10; C04B2111/00; C04B2111/00474; C04B2111/00637; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/34; C04B2235/3418; C04B2235/3427; C04B2235/3463; C04B2235/349; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/522; C04B2235/5224; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/60; C04B2235/606; C04B2235/70; C04B2235/96; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/062; C04B2237/09; C04B2237/30; C04B2237/32; C04B2237/38; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/62; C04B2237/64; C04B2237/76; C04B2237/86
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
61 words
A zirconium free inorganic refractory adhesive composition which on a dry weight basis consists of 33 to 80% mullite, 10 to 43% ceramic fiber, 5 to 20% alumina, 5 to 20% colloidal silica and 3 to 13% clay suspension agent, the composition upon setting being characterized by its high temperature electrical insulating properties and structural integrity with respect to thermal stresses.
Claim 2
Dependent Claim
61 words
A zirconium free inorganic refractory adhesive composition which on a dry weight basis consists of 33 to 80% mullite, 10 to 43% ceramic fiber, 5 to 20% alumina, 5 to 20% colloidal silica and 3 to 13% clay suspension agent, the composition upon setting being characterized by its high temperature electrical insulating properties and structural integrity with respect to thermal stresses.
Claim 3
Dependent Claim
15 words
An inorganic refractory adhesive as in claim 1 wherein the clay suspension agent is bentonite.
Claim 4
Dependent Claim
31 words
An inorganic refractory adhesive as in claim 1 which on a dry weight basis consists of 33-43% mullite, 33-43% ceramic fiber, 8-12% alumina, 8-12% colloidal silica and 3-5% clay suspension agent.
Claim 5
Dependent Claim
15 words
An inorganic refractory adhesive as in claim 3 wherein the clay suspension agent is bentonite.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |