US3516171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible grade stake with driving tool
Assignee: ROSS E MARTIN
•
Filing: 1967-02-20
•
Granted: 1970-06-23
•
Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Ross E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:40
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798317A
Cited
US2780869A
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US2867041A
Cited
US3117378A
Cited
US3378967A
Cited
US3307264A
Cited
US3391647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |