US3586218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten metal handling
Assignee: Foseco International Ltd
•
Filing: 1969-05-21
•
Granted: 1971-06-22
•
Expires: 1989-05-21
Abstract
Abstract Parts of metal handling apparatus which are adapted to be relatively movable tend to be hindered in such movement by the solidification of molten metal in contact therewith. To avoid this, prior to pouring molten metal into the apparatus, there are located at positions in the apparatus where such solidification would cause such hindrance, shapes of bonded fibrous material which are adapted to be burnt, melted or softened at the temperature of the molten metal.
Inventors
- 👤 John David Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
14 words
A method according to claim 1 wherein all the fibrous material is cellulosic fiber.
Claim 2
Dependent Claim
36 words
A method according to claim 1 wherein the fibrous material is a mixture of cellulosic fibrous material and an inorganic fiber selected from the class consisting of calcium silicate fiber, aluminum silicate fiber and slag wool.
Claim 3
Dependent Claim
37 words
A method according to claim 1 wherein the fibrous material is bonded with a binding agent selected from the class consisting of urea- and phenol-formaldehyde resins, furane resins, polyurethane resins, natural and synthetic gums and sulfite lye.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |