US3655447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for making porous bodies of integral structure
Assignee: Duracell Inc USA
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Filing: 1969-09-08
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Granted: 1972-04-11
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Expires: 1989-09-08
Abstract
Abstract Porous zinc fabricated bodies are disclosed. The bodies are integral and are essentially of zinc, comprising a continuous network of interconnected pores formed by the zinc. Total porosities of greater than 50 percent are obtained through novel methods utilizing low temperature compaction. The structures are of high strength and good machinability and show interlocking rod shaped particles of zinc.
Inventors
- 👤 Leonard B Griffiths
- 👤 Richard H Krock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:27
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; C; C22; C22C; C22C1/00; C22C1/04; H; H01; H01M; H01M4/00; H01M4/02; B22F2998/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
A zinc-mercury porous structure as in claim 1 in which the particles of zinc are interlocked when the liquidus of the metal is just reached and the rod-like configuration present in uncompacted powder is obtained.
Claim 2
Dependent Claim
89 words
A porous structure comprised of an alloy consisting of Zn-Hg of uniform and homogenous distribution characterized by particles of strong bond obtained through quick removal of the low melting point surface and having a porosity due to coarse grain structure of from 20 microns to several hundred microns apparent diameter said alloy containing from 4-10% mercury, said particles having rod-like configurations and interlocking in the manner of a felt-like structure, said particles consisting of zinc metal being fired with a thermal profile having a temperature range of 405*-420* C.
Claim 3
Dependent Claim
27 words
A zinc-mercury porous structure as in claim 1 wherein compaction pressure is as low as 1000 psi and is characterized by the particles being of rod-like morphology.
Claim 4
Dependent Claim
60 words
A zinc-mercury porous structure as in claim 1 fabricated at low compaction pressure, each particle being mercury rich which results in adjacent particles sticking together for good bonding, said particles having a rod-like morphology and a controlled porosity of from 20 microns to several hundred microns and characterized by its morphology to interlock in the manner of a felt-like structure.
Claim 5
Dependent Claim
17 words
A mix herein as in claim 1 and where NaCl or ZnSO4 is used in the compact.
Claim 6
Dependent Claim
26 words
A porous structure as in claim 3 wherein compaction pressure is as low as 1000 psi and is characterized by the particles being of rod-like morphology.
References Cited (Backward Citations)
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |