Patent US2449900A successfully refreshed from Google Patents.
US2449900A
Expired / Lapsed
US
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Apparatus for forming molds for centrifugal casting and centrifugally casting products therein
Assignee: Herman Pneumatic Machine Co
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Filing: 1946-02-18
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Granted: 1948-09-21
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Expires: 1966-02-18
Abstract
No abstract record available.
Inventors
- 👤 Loyal L Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:08
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/10; B22D13/101; B22D13/102; B22D13/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |