Patent US3378968A successfully refreshed from Google Patents.
US3378968A
Expired / Lapsed
US
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Cement form stake
Assignee: Individual
•
Filing: 1965-10-22
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Granted: 1968-04-23
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 James C Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:31
CPC Classifications
E; E04; E04G; E04G13/00; E01; E01C; E01C19/00; E01C19/50; E01C19/502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE252537C
Cited
US401782A
Cited
US1428247A
Cited
US1736807A
Cited
US1855471A
Cited
US2835017A
Cited
US3305985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |