Patent US3756272A successfully refreshed from Google Patents.
US2583533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of destroying patterns
Assignee: Individual
•
Filing: 1947-10-04
•
Granted: 1952-01-29
•
Expires: 1967-10-04
Abstract
No abstract record available.
Inventors
- 👤 Hiensch Johannes Nathanael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:37
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02; B22C7/023; B22C9/00; B22C9/02; B22C9/04; B22C9/046; B29; B29C; B29C33/00; B29C33/44; B29C33/448
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A METHOD OF CASTING METALS, THAT IMPROVEMENT WHICH INCLUDES THE STEPS OF PROVIDING A CASTING MOULD MEAD WITH A PATTERN OF A SUBSTANCE ESSENTIALLY COMPRISING A MATERIAL WHICH COMBINES WITH OXYGEN IN AN EXOTHERMIC REACTION AND WHOSE OXIDATION PRODUCTS ARE PRIMARILY GASEOUS, AN OXYGEN-COMBUSTIBLE BINDER AND A NORMALLY STABLE, SOLID, OXYGEN-RICH COMPOUND WHICH IS UNSTABLE AT TEMPERATURES BELOW THE TEMPERATURE OF SAID EXOTHERMIC REACTION, SAID COMPOUND BEING PRESENT IN AN AMOUNT SUFFICIENT FULLY TO COMBUST SAID MATERIAL AND SAID BINDER, AND BURNING SAID SUBSTANCE WITHIN SAID MOLD, THE OXYGEN FOR BURNING BEING SUPPLIED BY SAID COMPOUND, WHEREBY TO LEAVE A MOLD CAVITY.
Claim 2
Dependent Claim
103 words
IN A METHOD OF CASTING METALS, THAT IMPROVEMENT WHICH INCLUDES THE STEPS OF PROVIDING A CASTING MOULD MEAD WITH A PATTERN OF A SUBSTANCE ESSENTIALLY COMPRISING A MATERIAL WHICH COMBINES WITH OXYGEN IN AN EXOTHERMIC REACTION AND WHOSE OXIDATION PRODUCTS ARE PRIMARILY GASEOUS, AN OXYGEN-COMBUSTIBLE BINDER AND A NORMALLY STABLE, SOLID, OXYGEN-RICH COMPOUND WHICH IS UNSTABLE AT TEMPERATURES BELOW THE TEMPERATURE OF SAID EXOTHERMIC REACTION, SAID COMPOUND BEING PRESENT IN AN AMOUNT SUFFICIENT FULLY TO COMBUST SAID MATERIAL AND SAID BINDER, AND BURNING SAID SUBSTANCE WITHIN SAID MOLD, THE OXYGEN FOR BURNING BEING SUPPLIED BY SAID COMPOUND, WHEREBY TO LEAVE A MOLD CAVITY.
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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |