US2847772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slope grader attachment
Assignee: Individual
•
Filing: 1956-02-28
•
Granted: 1958-08-19
•
Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Wayne W Mcmullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:49
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7663; E02F3/7686; E02F3/96; E02F3/961; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1498
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1875534A
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US1529727A
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US1843260A
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US1818434A
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US1981284A
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US2125134A
Cited
US2284463A
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US2659988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |