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US2869189A
Expired / Lapsed
US
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Helicoid strike-off device for variable height flasks
Assignee: BELLE CITY MALLEABLE IRON Co
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Filing: 1957-12-16
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Granted: 1959-01-20
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Howard C Pirsig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:56
CPC Classifications
B; B22; B22C; B22C19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA479058A
Cited
US1794334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |