US2536760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Road guard
Assignee: UNITED STEEL FABRICATORS Inc
•
Filing: 1947-01-15
•
Granted: 1951-01-02
•
Expires: 1967-01-15
Abstract
No abstract record available.
Inventors
- 👤 William C Martin
- 👤 Macleod Donald Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:31
CPC Classifications
E; E01; E01F; E01F15/00; E01F15/02; E01F15/04; E01F15/0407; E01F15/0423; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1177348A
Cited
US2047990A
Cited
US1989763A
Cited
US2047991A
Cited
US2007185A
Cited
US2060673A
Cited
US2088001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |