US1845666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair tread grooving machine
Assignee: Individual
•
Filing: 1929-11-18
•
Granted: 1932-02-16
•
Expires: 1949-11-18
Abstract
No abstract record available.
Inventors
- 👤 Michael J Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:35
CPC Classifications
B; B27; B27B; B27B9/00; B27B9/02; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/048; B28D1/18
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) | 1935-02-15 | 1935-08-17 | 1936-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-15 | 1939-08-17 | 1940-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-15 | 1943-08-17 | 1944-02-16 | $7700.00 | Window Closed / Lapsed |