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Patent US2668335A successfully refreshed from Google Patents.
US2668335A
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Locking device for molding flasks
Assignee: HINES FLASK CO
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Filing: 1950-10-06
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Granted: 1954-02-09
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Expires: 1970-10-06
Abstract
No abstract record available.
Inventors
- 👤 James F Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:23
CPC Classifications
B; B22; B22C; B22C21/00; B22C21/02; B22C21/08; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44966; Y10T292/00; Y10T292/08; Y10T292/1039; Y10T292/1041; Y10T292/1043; Y10T292/1075; Y10T292/1083; Y10T292/1092; Y10T403/00; Y10T403/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |