Patent US995898A successfully refreshed from Google Patents.
US3201837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for casting metal articles
Assignee: Griffin Wheel Co Inc
•
Filing: 1962-04-06
•
Granted: 1965-08-24
•
Expires: 1982-04-06
Abstract
No abstract record available.
Inventors
- 👤 Sylvester Edmund Quincy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A METHOD OF PRODUCTING FLOW OF MOLTEN METAL FROM A LADLE CHAMBER HAVING A BOTTOM POURING OPENING WITH A REFRACTORY STOPPER MEMBER THEREIN AND COMMUNICATING WITH AN UPWARDLY DIRECTED POURING CONDUIT, COMPRISING THE STEPS OF CREATING A SUPERATMOSPHERIC PRESSURE WITHIN SAID POURING CONDUIT SUFFICIENT TO DISLODGE SAID STOPPER, RELIEVING SAID SUPERATMOSPHERIC PRESSURE, AND APPLYING SUPERATMOSPHERIC PRESSURE TO THE LADLE CHAMBER AND CONTINUING SUCH APPLICATION TO SUCH AN EXTENT AS TO RAISE THE LEVEL OF THE MOLTEN METAL INI THE POURING TUBE ABOVE THAT IN THE LADLE CHAMBER.
References Cited (Backward Citations)
US1305145A
Cited
US1025092A
Cited
US2310766A
Cited
US2448903A
Cited
US2847739A
Cited
US2865068A
Cited
US2997756A
Cited
US3014255A
Cited
US2863189A
Cited
US3054155A
Cited
US3044132A
Cited
US3040400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |