US2780869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grade line stakes
Assignee: Individual
•
Filing: 1955-04-07
•
Granted: 1957-02-12
•
Expires: 1975-04-07
Abstract
No abstract record available.
Inventors
- 👤 George E Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:35
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02; G01C15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE364986C
Cited
US1010007A
Cited
US1767519A
Cited
US1991907A
Cited
US2071823A
Cited
US2429485A
Cited
US2433314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |