US2837844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rooter attachment for bulldozers or the like
Assignee: H&L Tooth Co
•
Filing: 1955-06-23
•
Granted: 1958-06-10
•
Expires: 1975-06-23
Abstract
No abstract record available.
Inventors
- 👤 Richard L Launder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:05
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8152; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459; Y10T403/70; Y10T403/7018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297677A
Cited
US2346567A
Cited
US2632373A
Cited
US2497351A
Cited
US2568075A
Cited
US2718075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |