US3623286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breakaway post
Assignee: Individual
•
Filing: 1969-09-19
•
Granted: 1971-11-30
•
Expires: 1989-09-19
Abstract
Abstract A BREAKWAY POST FOR DELINEATING THE PRESENCE OR BOUNDARY OF A HAZARD WHICH POST EMBODIES A SHEARING MEMBER HAVING AT LEAST A PAIR OF BREAKWAY PILLARS.
Inventors
- 👤 Alfred P Parduhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:26
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/623; E01F9/631; E01F9/635
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |