Patent US2994255A successfully refreshed from Google Patents.
US2994255A
Expired / Lapsed
US
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Safety barrier for roads
Assignee: Individual
•
Filing: 1957-09-11
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Granted: 1961-08-01
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Expires: 1977-09-11
Abstract
No abstract record available.
Inventors
- 👤 Trief Marcel
- 👤 Trief Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:07
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/02; E01F15/08; E01F15/088; E01F15/081; E01F15/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2011531A
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US1927189A
Cited
US2153392A
Cited
US2249979A
Cited
US2316660A
Cited
US2653450A
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GB683336A
Cited
DK78878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |