US3286312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory coated casting mold
Assignee: Arthur D Little Inc
•
Filing: 1965-03-29
•
Granted: 1966-11-22
•
Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Richard S Davis
- 👤 John L Engelke
- 👤 John B Mattuck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
B; B22; B22C; B22C23/00; B22C23/02; B22C3/00; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PERMANENT MOLD FOR CASTING MOLTEN METALS, COMPRISING (B) A THIN LAYER OF SIO2 COVERING THAT PORTION OF THE (A) A CAVITY SUITABLE FOR RECEIVING THE MOLTEN METAL TO BE CAST; CAVITY SURFACE WHICH IS CONTACTED BY SAID MOLTEN METAL; AND (C) A SUBSTRATE IN WHICH SAID CAVITY IS DEFINED, AT LEAST THAT PORTION OF SAID SUBSTRATE DIRECTLY IN CONTACT WITH SAID LAYER OF SIO2 BEING OF A MATERIAL CONTAINING CHEMICALLY BONDED SILICON IN A FORM WHICH IS READILU OXIDIZED TO SIO2 IN AN OXIDIZING ATMOSPHERE, SAID MATERIAL BEING ONE WHICH RETAINS ITS STRUCTURAL INTEGRITY AT THE MELTING TEMPERATURE OF THE METAL TO BE CAST.
Claim 2
Dependent Claim
105 words
A PERMANENT MOLD FOR CASTING MOLTEN METALS, COMPRISING (B) A THIN LAYER OF SIO2 COVERING THAT PORTION OF THE (A) A CAVITY SUITABLE FOR RECEIVING THE MOLTEN METAL TO BE CAST; CAVITY SURFACE WHICH IS CONTACTED BY SAID MOLTEN METAL; AND (C) A SUBSTRATE IN WHICH SAID CAVITY IS DEFINED, AT LEAST THAT PORTION OF SAID SUBSTRATE DIRECTLY IN CONTACT WITH SAID LAYER OF SIO2 BEING OF A MATERIAL CONTAINING CHEMICALLY BONDED SILICON IN A FORM WHICH IS READILU OXIDIZED TO SIO2 IN AN OXIDIZING ATMOSPHERE, SAID MATERIAL BEING ONE WHICH RETAINS ITS STRUCTURAL INTEGRITY AT THE MELTING TEMPERATURE OF THE METAL TO BE CAST.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |