US1811739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for trucks
Assignee: WILLIS DRILLING MACHINE AND MANUFACTURING Co
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Filing: 1928-06-25
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Granted: 1931-06-23
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Expires: 1948-06-25
Abstract
No abstract record available.
Inventors
- 👤 Reuben M Willis
- 👤 Carter A Wilis
- 👤 Gordon J Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-06-22 | 1934-12-22 | 1935-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-22 | 1938-12-22 | 1939-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-22 | 1942-12-22 | 1943-06-23 | $7700.00 | Window Closed / Lapsed |