US2812265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory mold material
Assignee: Howmet Turbine Components Corp
•
Filing: 1953-12-14
•
Granted: 1957-11-05
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Folsom Ralph Lenzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:34
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/38; A; A61; A61C; A61C13/00; A61C13/0003; B29K; B29K2909/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
INVESTMENT COMPOSITION SUITABLE FOR THE PRODUCTION OF REFACTORY MOLDS AND MODELS FOR PRECISION CASTINGS AND PARTICULARLY FOR DENTAL CASTINGS FROM HIGH MELTING METALS AND METAL ALLOYS, SAID COMPOSITION BEING A DRY REFRACTORY MIXTURE CONSISTING OF 30% TO 85% BY WEIGHT OF A GRADED PERICLASE CONTAINING AT LEAST 10% BY WEIGHT OF RELATIVELY COARSE PARTICLES IN EXCESS OF 175 MICRONS AND AT LEAST 20% BY WEIGHT OF RELATIVELY FINE PARTICLES OF A SIZE SMALLER THAN 75 MICRONS, 15% TO 70% BY WEIGHT OF ZIECON, AND UP TO 17% BY WEIGHT OF A SUBSTANTIALLY INERT REFRACTORY FILLER.
Claim 2
Dependent Claim
95 words
INVESTMENT COMPOSITION SUITABLE FOR THE PRODUCTION OF REFACTORY MOLDS AND MODELS FOR PRECISION CASTINGS AND PARTICULARLY FOR DENTAL CASTINGS FROM HIGH MELTING METALS AND METAL ALLOYS, SAID COMPOSITION BEING A DRY REFRACTORY MIXTURE CONSISTING OF 30% TO 85% BY WEIGHT OF A GRADED PERICLASE CONTAINING AT LEAST 10% BY WEIGHT OF RELATIVELY COARSE PARTICLES IN EXCESS OF 175 MICRONS AND AT LEAST 20% BY WEIGHT OF RELATIVELY FINE PARTICLES OF A SIZE SMALLER THAN 75 MICRONS, 15% TO 70% BY WEIGHT OF ZIECON, AND UP TO 17% BY WEIGHT OF A SUBSTANTIALLY INERT REFRACTORY FILLER.
References Cited (Backward Citations)
US1952120A
Cited
US1952119A
Cited
US1909008A
Cited
US2195452A
Cited
US2243094A
Cited
US2409844A
Cited
US2466138A
Cited
US2534328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |