US3138856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing clad porous metal articles
Assignee: Dow Chemical Co
•
Filing: 1961-10-09
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Granted: 1964-06-30
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Henry A Kuchek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/08; B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2051; B23; B23K; B23K20/00; B23K20/22; B23K20/233; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF PRODUCING A CLAD, POROUS, METAL ARTICLE WHICH COMPRISES CASTING A METAL INTO A MOLD FILLED WITH WATER SOLUBLE SALT GRANULES WHICH HAVE A MELTING POINT ABOVE THE TEMPERATURE AT WHICH THE METAL IS CAST, REMOVING THE SALT-METAL CASTING FROM THE MOLD AFTER SOLIDIFICATION, LEACHING THE SALT FROM THE CASTING, FILLING THE PORES THUS-FORMED WITH A WATER SOLUBLE SALT WHICH MELTS AT A TEMPERATURE BELOW THE MELTING POINT OF THE METAL,
Claim 2
Independent Claim
73 words
THE METHOD OF PRODUCING A CLAD, POROUS, METAL ARTICLE WHICH COMPRISES CASTING A METAL INTO A MOLD FILLED WITH WATER SOLUBLE SALT GRANULES WHICH HAVE A MELTING POINT ABOVE THE TEMPERATURE AT WHICH THE METAL IS CAST, REMOVING THE SALT-METAL CASTING FROM THE MOLD AFTER SOLIDIFICATION, LEACHING THE SALT FROM THE CASTING, FILLING THE PORES THUS-FORMED WITH A WATER SOLUBLE SALT WHICH MELTS AT A TEMPERATURE BELOW THE MELTING POINT OF THE METAL,
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |