US3445129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for trench guard rail
Assignee: Cleveland Trencher Co
•
Filing: 1966-12-12
•
Granted: 1969-05-20
•
Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Vincent S Penote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:29
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/02; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/345; Y10T403/36; Y10T403/362; Y10T403/364; Y10T403/366; Y10T403/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US488349A
Cited
CA637526A
Cited
US1932959A
Cited
US2818289A
Cited
GB829376A
Cited
FR1174089A
Cited
FR73556E
Cited
FR1231101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |