US4050933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impervious metal object and method of making the same
Assignee: Stanadyne LLC
•
Filing: 1974-07-03
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Granted: 1977-09-27
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Expires: 1994-07-03
Abstract
Abstract A metallic object formed of metal particles compressed together to form a rigid object. Each of the metal particles is coated with a metal having a melting temperature lower than that of the metal of the particles. The coating metal fills the voids between the particles so that the object is impervious to fluids.
Inventors
- 👤 Howard I. Sanderow
- 👤 Kenneth M. Merz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:33
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; B; B22; B22F; B22F1/00; B22F1/17; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
A method of making an impervious metal body comprising the steps of completely coating iron powder particles with a layer of copper which is about 12% to about 30% by weight of the body, compressing said coated particles together, and heating the compressed particles to a temperature at which the copper layer melts and the melted copper flows and fills the voids between the particles.
Claim 2
Independent Claim
65 words
A method of making an impervious metal body comprising the steps of completely coating iron powder particles with a layer of copper which is about 12% to about 30% by weight of the body, compressing said coated particles together, and heating the compressed particles to a temperature at which the copper layer melts and the melted copper flows and fills the voids between the particles.
Claim 3
Dependent Claim
25 words
The method in accordance with claim 1 in which the compressed coated particles are heated at the same time that the particles are compressed together.
Claim 4
Dependent Claim
21 words
The method in accordance with claim 1 in which the iron particles are coated with the copper layer by chemical displacement.
Claim 5
Dependent Claim
23 words
The method in accordance with claim 3 in which the iron particles are coated by immersing in an aqueous solution of copper sulphate.
Claim 6
Dependent Claim
22 words
The method in accordance with claim 4 in which graphite is mixed with the coated particles prior to compressing the particles together.
Claim 7
Dependent Claim
20 words
The method in accordance with claim 5 in which the carbon is present in the amount of 0.5% to 1.0%.
Claim 8
Dependent Claim
59 words
An impervious metal body produced by completely coating iron powder particles with a layer of copper which is about 12% to about 30% by weight of the body, compressing the coated particles together, and heating the compressed particles to a temperature at which the copper layer melts and the melted copper flows and fills the voids between the particles.
Claim 9
Dependent Claim
59 words
An impervious metal body produced by completely coating iron powder particles with a layer of copper which is about 12% to about 30% by weight of the body, compressing the coated particles together, and heating the compressed particles to a temperature at which the copper layer melts and the melted copper flows and fills the voids between the particles.
Claim 10
Dependent Claim
26 words
The metal body in accordance with claim 7 in which the compressed coated particles are heated at the same time that the particles are compressed together.
Claim 11
Dependent Claim
22 words
The metal body in accordance with claim 7 in which the iron particles are coated with the copper layer by chemical displacement.
Claim 12
Dependent Claim
24 words
The metal body in accordance with claim 9 in which the iron particles are coated by immersing in an aqueous solution of copper sulphate.
Claim 13
Dependent Claim
23 words
The metal body in accordance with claim 10 in which graphite is mixed with the coated particles prior to compressing the particles together.
Claim 14
Dependent Claim
24 words
The metal body in accordance with claim 11 in which the carbon is present in the mix in the amount of 0.5% to 1.0%.
Claim 15
Dependent Claim
31 words
The method in accordance with claim 1 in which the iron powder particles are coated with a layer of copper which is between 12% and 16% by weight of the body.
Claim 16
Dependent Claim
32 words
The metal body in accordance with claim 7 in which the iron powder particles are coated with a layer of copper which is between 12% and 16% by weight of the body.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |