Patent US3446266A successfully refreshed from Google Patents.
US3446266A
Expired / Lapsed
US
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Investment casting apparatus
Assignee: Precision Metalsmiths Inc
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Filing: 1965-10-19
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Granted: 1969-05-27
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Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Claude H Watts
- 👤 Arthur A Shields
- 👤 Harvey W Krohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:40
CPC Classifications
B; B22; B22C; B22C13/00; B22C13/08; B22C13/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2041788A
Cited
US2669758A
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US2845044A
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US2859497A
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US2824029A
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US2981631A
Cited
US3196506A
Cited
US3002231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |