Patent US1789054A successfully refreshed from Google Patents.
Patent US6498025B1 successfully refreshed from Google Patents.
US3196501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for metal casting
Assignee: BALGARSKA AKADEMIA NA NAUKITE
•
Filing: 1962-02-13
•
Granted: 1965-07-27
•
Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Angel T Balevsky
- 👤 Ivan D Nikolov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:10
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PRESSURE CASTING DEVICE COMPRISING, IN COMBINATION, A MOLD, A LIQUFIED MATERIAL RESERVOIR CONNECTED TO SAID MOLD, MEANS FOR APPLYING THE SAME SUPERATMOSPHERIC PRESSURE TO BOTH SAID MOLD AND SAID LIQUEFIED MATERIAL RESERVOIR, MEANS FOR ESTABLISHING A PRESSURE DIFFERENTIAL BETWEEN SAID RESERVOIR AND SAID MOLD, WHILE MAINTAINING THE PRESSURE AT SAID RESERVOIR AND SAID MOLD AT SUPERATMOSPHERIC VALUES WITH THE PRESSURE AT THE MOLD BEING LESS THAN THE PRESSURE AT THE LIQUEFIED MATERIAL RESERVOIR, TO CAUSE THE LIQUEFIED MATERIAL TO FLOW FROM THE LIQUEFIED MATERIAL RESERVOIR TO MOLD TO FILL THE MOLD GRADUALLY, AND AND MEANS FOR MAINTAINING SAID PRESSURE DIFFERENTIAL CONSTANT DURING THE ENTIRE PROCESS OF FILLING THE MOLD, INCLUDING A RESERVOIR OF FLUID UNDER PRESSURE CONNECTED TO ONE SIDE OF SAID MOLD AND TO SAID LIQUEFIED MATERIAL RESERVOIR.
Claim 2
Dependent Claim
130 words
A PRESSURE CASTING DEVICE COMPRISING, IN COMBINATION, A MOLD, A LIQUFIED MATERIAL RESERVOIR CONNECTED TO SAID MOLD, MEANS FOR APPLYING THE SAME SUPERATMOSPHERIC PRESSURE TO BOTH SAID MOLD AND SAID LIQUEFIED MATERIAL RESERVOIR, MEANS FOR ESTABLISHING A PRESSURE DIFFERENTIAL BETWEEN SAID RESERVOIR AND SAID MOLD, WHILE MAINTAINING THE PRESSURE AT SAID RESERVOIR AND SAID MOLD AT SUPERATMOSPHERIC VALUES WITH THE PRESSURE AT THE MOLD BEING LESS THAN THE PRESSURE AT THE LIQUEFIED MATERIAL RESERVOIR, TO CAUSE THE LIQUEFIED MATERIAL TO FLOW FROM THE LIQUEFIED MATERIAL RESERVOIR TO MOLD TO FILL THE MOLD GRADUALLY, AND AND MEANS FOR MAINTAINING SAID PRESSURE DIFFERENTIAL CONSTANT DURING THE ENTIRE PROCESS OF FILLING THE MOLD, INCLUDING A RESERVOIR OF FLUID UNDER PRESSURE CONNECTED TO ONE SIDE OF SAID MOLD AND TO SAID LIQUEFIED MATERIAL RESERVOIR.
References Cited (Backward Citations)
GB190911423A
Cited
US2210544A
Cited
US2310766A
Cited
US2821757A
Cited
US2997756A
Cited
US3032841A
Cited
US2994115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |