Patent US2646969A successfully refreshed from Google Patents.
US2646969A
Expired / Lapsed
US
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Highway guard
Assignee: United States Spring & Bumper Co Inc
•
Filing: 1950-01-07
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Granted: 1953-07-28
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Expires: 1970-01-07
Abstract
No abstract record available.
Inventors
- 👤 Niels E Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:12
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/02; E01F15/04; E01F15/0407; E01F15/0415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1002641A
Cited
US1726267A
Cited
US1839328A
Cited
US2050694A
Cited
US2136415A
Cited
US2163809A
Cited
US2238348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |