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US3485202A
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Pyramidal highway warning marker
Assignee: PLATT CORP
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Filing: 1968-08-21
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Granted: 1969-12-23
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Expires: 1988-08-21
Abstract
No abstract record available.
Inventors
- 👤 James Beach Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:01
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/604; E01F9/612; E01F9/623; E01F9/654; E01F9/688
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687616A
Cited
FR603337A
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US2483734A
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US2771260A
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US2667000A
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US2965280A
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US2935238A
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US2965376A
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US3244348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |