US3938232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing catalyst type exhaust gas purifier
Assignee: Toyota Motor Corp
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Filing: 1974-04-24
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Granted: 1976-02-17
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Expires: 1994-04-24
Abstract
Abstract Method of manufacturing a catalyst type exhaust gas purifier utilizing a divisible vessel to hold an integrated catalyst, while a packing is inserted at the junction between the divisible parts. The space between the vessel and the catalyst is filled with a castable refractory material, which is then solidified, after which the packing is removed and then the parts of the vessel are drawn together at said junction.
Inventors
- 👤 Fumiyoshi Noda
- 👤 Mikio Murachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:50
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2853; F01N3/2803; F01N3/2825; F01N3/2828; F01N3/2867; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345; Y10T29/49826; Y10T29/4998; Y10T29/49982; Y10T29/49984; Y10T29/49993
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
Method of manufacturing a catalyst type exhaust gas purifier, which method comprises the steps of: placing one side of the catalyst near the inner surface of one part of a divisible vessel; positioning the other part of said divisible vessel near the opposite side of said catalyst while inserting packing means between said parts which keeps said parts separated; said catalyst being smaller than said vessel so that a space is also left between said vessel and catalyst; charging a castable refractory into the space between said vessel and catalyst; solidifying and firing the refractory; and removing said packing and tightening the two parts of said vessel to compress said refractory, which has some elasticity, against said catalyst.
Claim 2
Dependent Claim
118 words
Method of manufacturing a catalyst type exhaust gas purifier, which method comprises the steps of: placing one side of the catalyst near the inner surface of one part of a divisible vessel; positioning the other part of said divisible vessel near the opposite side of said catalyst while inserting packing means between said parts which keeps said parts separated; said catalyst being smaller than said vessel so that a space is also left between said vessel and catalyst; charging a castable refractory into the space between said vessel and catalyst; solidifying and firing the refractory; and removing said packing and tightening the two parts of said vessel to compress said refractory, which has some elasticity, against said catalyst.
Claim 3
Dependent Claim
29 words
Method of manufacturing a catalyst type exhaust gas purifier as claimed in claim 1, wherein the packing is made of a material which is removed by the firing process.
Claim 4
Dependent Claim
32 words
Method of manufacturing a catalyst type exhaust gas purifier as claimed in claim 1, wherein the packing is made of a material which remains after the firing process and is then removed.
Claim 5
Dependent Claim
26 words
Method of manufacturing a catalyst type exhaust gas purifier as claimed in claim 1, wherein the catalyst is mounted on a centering plate within the vessel.
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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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |