US3274651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for injecting sand in moulding machines
Assignee: Individual
•
Filing: 1965-03-29
•
Granted: 1966-09-27
•
Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Oliveira Fabio De Azevedo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; B22C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF INJECTING A MIXTURE OF RESIN AND SAND INTO A MOULD CAVITY COMPRISING TAKING TWO COLUMN OF SAID MIXTURE AND APPLYING LOW PRESSURE AIR THROUGH A FILTER AGAINST THE BOTTOM OF SAID COLUMNS TO FORCE THE MIXTURE INTO SAID CAVITY, THEREAFTER INCREASING SAID AIR PRESSURE A SUBSTANTIAL AMOUNT TO COMPACT THE MIXTURE IN SAID CAVITY, THEREAFTER RELEASING THE AIR PRESSURE APPLIED AGAINST ONE COLUMN WHILE MAINTAINING SAID PRESSURE AGAINST THE BOT-
Claim 2
Independent Claim
73 words
THE METHOD OF INJECTING A MIXTURE OF RESIN AND SAND INTO A MOULD CAVITY COMPRISING TAKING TWO COLUMN OF SAID MIXTURE AND APPLYING LOW PRESSURE AIR THROUGH A FILTER AGAINST THE BOTTOM OF SAID COLUMNS TO FORCE THE MIXTURE INTO SAID CAVITY, THEREAFTER INCREASING SAID AIR PRESSURE A SUBSTANTIAL AMOUNT TO COMPACT THE MIXTURE IN SAID CAVITY, THEREAFTER RELEASING THE AIR PRESSURE APPLIED AGAINST ONE COLUMN WHILE MAINTAINING SAID PRESSURE AGAINST THE BOT-
References Cited (Backward Citations)
US2545944A
Cited
US2779074A
Cited
US2798266A
Cited
US2893079A
Cited
US3006046A
Cited
US3007216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |