Patent US3397737A successfully refreshed from Google Patents.
US3397737A
Expired / Lapsed
US
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Foundry mold conveying apparatus with pneumatic diaphragm clamping means
Assignee: Altamil Corp
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Filing: 1965-08-03
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Granted: 1968-08-20
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Expires: 1985-08-03
Abstract
No abstract record available.
Inventors
- 👤 Tuttle Wainwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:48
CPC Classifications
B; B22; B22D; B22D5/00; B22D5/02; B22C; B22C11/00; B22C11/02; B22C11/04; B22D47/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US311902A
Cited
US2088123A
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US2192133A
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US2893057A
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US2843895A
Cited
US3181207A
Cited
US3209414A
Cited
US3237252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |