Patent US3177574A successfully refreshed from Google Patents.
US3177574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clad porous metal sheets
Assignee: Dow Chemical Co
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Filing: 1961-10-09
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Granted: 1965-04-13
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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
2026-11-01 10:34
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PRODUCING A GENERALLY FLAT, RECTANGULAR 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, PLACING SAID CASTING AS THE CORE IN A SECOND MOLD, CASTING METAL INTO THE SECOND MOLD SO AS TO SUR-
Claim 2
Independent Claim
66 words
THE METHOD OF PRODUCING A GENERALLY FLAT, RECTANGULAR 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, PLACING SAID CASTING AS THE CORE IN A SECOND MOLD, CASTING METAL INTO THE SECOND MOLD SO AS TO SUR-
References Cited (Backward Citations)
FR615147A
Cited
US1743567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |