US3577635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for isostatic compression, such as the manufacture of powder bodies
Assignee: ABB Norden Holding AB
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Filing: 1968-10-30
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Granted: 1971-05-04
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Expires: 1988-10-30
Abstract
Abstract A body to be compressed is inserted within a flexible container containing a compression medium compatible with the body and the container is then placed within an outer compression chamber containing another compression medium compatible with the container and chamber.
Inventors
- 👤 Carl Bergman
- 👤 Harry Claesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:18
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; B; B22; B22F; B22F3/00; B22F3/02; B22F3/04; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/52; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089; Y10T29/49091
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
Method of manufacturing powder bodies according to claim 1, characterized in that before compression the powder body is placed in a thin casing of plastic, metal foil or the like, substantially only to keep the powder material together before the compression.
Claim 2
Dependent Claim
29 words
Method of manufacturing electrical heating elements according to claim 1, characterized in that a skeleton tube sealed at the ends and surrounding the powder body is used as casing.
Claim 3
Dependent Claim
32 words
Method of manufacturing electrical heating elements according to claim 1, characterized in that the container is filled with water and the chamber, outside the container, is filled with hydraulic oil before compressing.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |