US2851935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highway marker
Assignee: Root Spring Scraper Co
•
Filing: 1953-06-08
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Granted: 1958-09-16
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Expires: 1973-06-08
Abstract
No abstract record available.
Inventors
- 👤 Weeks Warren Dan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/50; E01F9/576; E01F9/588; E01F9/553; E01F9/565; E01F9/571
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |