Patent US3873328A successfully refreshed from Google Patents.
US3873328A
Expired / Lapsed
US
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Catalytic crystalline glass fibers
Assignee: Vibrantz Corp
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Filing: 1972-08-09
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Granted: 1975-03-25
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Expires: 1992-08-09
Abstract
Abstract Catalytic, oxidation-inducing glass fibers and a process for forming them are disclosed in which the glass of the fibers is substantially crystalline and contains from about 10 percent to about 70 percent by weight of an oxide selected from the group consisting of an oxidation-inducing oxide of cobalt, manganese, copper, chromium, and mixtures thereof. The crystalline glass fibers are prepared by fiberizing a glass composition containing at least one of the metal oxides to form amorphous glass fibers; and then heat-treating the resulting glass fibers at an elevated oxidation temperature but below the liquidus temperature of the glass of the fibers to crystallize at least part of the amorphous glass.
Inventors
- 👤 Walter H Brueggemann
- 👤 Jack S Gilhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:01
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J35/00; B01J35/50; B01J35/58; C; C03; C03C; C03C10/00; C03C13/00; C03C13/006; C03C3/00; C03C3/12; C03C4/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A CATALYTIC OXIDATION-INDUCING GLASS FIBER ADAPTED TO CONTACT AN OXIDIZABLE GAS TO CATALYZE THE OXIDATION THEREOF AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 350*F TO ABOUT 600*F, SAID GLASS FIBER COMPRISING A HEAT-TREATED, CATALYTIC-OXIDATIVE FIBER OF NORMALLY AMORPHOUS GLASS HAVING SUBSTANTIAL CRYSTALLINITY THROUGHOUT THE FIBER BY VIRTUE OF SUCH HEAT TREATMENT AND CONTAINING AS PART OF THE CRYSTAL STRUCTURE FROM ABOUT 10 PERCENT TO ABOUT 70 PERCENT BY WEIGHT OF AN OXIDATIONINDUCTING OXIDE DEFINING SITES OF CHEMICAL ACTIVITY TO RENDER THE FIBER CATALYTIC FOR OXIDATION REACTIONS, SAID OXIDE BEING SELECTED FROM A GROUP CONSISTING OF AN OXIDE OF COBALT, MANGANESE, COPPER, CHROMIUM, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
106 words
A CATALYTIC OXIDATION-INDUCING GLASS FIBER ADAPTED TO CONTACT AN OXIDIZABLE GAS TO CATALYZE THE OXIDATION THEREOF AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 350*F TO ABOUT 600*F, SAID GLASS FIBER COMPRISING A HEAT-TREATED, CATALYTIC-OXIDATIVE FIBER OF NORMALLY AMORPHOUS GLASS HAVING SUBSTANTIAL CRYSTALLINITY THROUGHOUT THE FIBER BY VIRTUE OF SUCH HEAT TREATMENT AND CONTAINING AS PART OF THE CRYSTAL STRUCTURE FROM ABOUT 10 PERCENT TO ABOUT 70 PERCENT BY WEIGHT OF AN OXIDATIONINDUCTING OXIDE DEFINING SITES OF CHEMICAL ACTIVITY TO RENDER THE FIBER CATALYTIC FOR OXIDATION REACTIONS, SAID OXIDE BEING SELECTED FROM A GROUP CONSISTING OF AN OXIDE OF COBALT, MANGANESE, COPPER, CHROMIUM, AND MIXTURES THEREOF.
Claim 3
Dependent Claim
40 words
The glass fiber of claim 1 in which said glass fiber is associated with a plurality of other like fibers in mat or batt form, and said mat or batt form is adapted to contact the gas to be oxidized.
Claim 4
Dependent Claim
36 words
The glass fiber of claim 1 in which said oxide is chromium oxide in combination with at least 5 percent by weight of the glass of an an oxide of cobalt, manganese, copper, and mixtures thereof.
Claim 5
Dependent Claim
25 words
The glass fiber of claim 1 in which said oxide is present in an amouNt of about 15 percent to about 55 percent by weight.
Claim 6
Dependent Claim
13 words
The glass fiber of claim 1 in which said oxide is manganese oxide.
Claim 7
Dependent Claim
13 words
The glass fiber of claim 1 in which said oxide is copper oxide.
Claim 8
Dependent Claim
13 words
The glass fiber of claim 1 in which said oxide is cobalt oxide.
Claim 9
Dependent Claim
13 words
The glass fiber of claim 1 in which said oxide is chromium oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |