US3968957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas carburizing furnace
Assignee: Nachi Fujikoshi Corp
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Filing: 1975-09-10
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Granted: 1976-07-13
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Expires: 1995-09-10
Abstract
Abstract A gas carburizing furnace wherein the liquid organic composition is introduced into the furnace through a perforated container contained therein. The perforated container comprises a thermal plate at the bottom and perforated walls made from a catalytic material. Therefore, the liquid organic composition entering the container through the dropping port is vaporized when it comes in contact with the hot thermal plate and is cracked while passing through the perforations in the catalytic material.
Inventors
- 👤 Takeji Asai
- 👤 Kaishu Yamazumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20; C23C8/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A gas carburizing furnace having a dropping port to supply liquid organic composition into the interior of said furnace and a vaporizing and catalyzing device, the improvement comprising: a thermal plate, said plate being directly under said dropping port; and a perforated housing, said housing being integral with and surrounding said thermal plate, said housing further being coupled to the interior of said furnace and together with said thermal plate and the interior of said furnace forms a chamber into which said liquid organic composition is supplied.
Claim 2
Dependent Claim
87 words
A gas carburizing furnace having a dropping port to supply liquid organic composition into the interior of said furnace and a vaporizing and catalyzing device, the improvement comprising: a thermal plate, said plate being directly under said dropping port; and a perforated housing, said housing being integral with and surrounding said thermal plate, said housing further being coupled to the interior of said furnace and together with said thermal plate and the interior of said furnace forms a chamber into which said liquid organic composition is supplied.
Claim 3
Dependent Claim
18 words
The gas carburizing furnace according to claim 1 wherein said house is lined with a porous refractory material.
Claim 4
Dependent Claim
17 words
The gas carburizing furnace according to claim 2 further comprising a catalyst in said porous refractory material.
Claim 5
Dependent Claim
13 words
The gas carburizing furnace according to claim 2 wherein said catalyst is nickel.
Claim 6
Dependent Claim
18 words
The gas carburizing furnace according to claim 1 wherein said housing is made from a porous refractory material.
References Cited (Backward Citations)
US975077A
Cited
US3917238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |