US972729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric rotary floor surfacing, scrubbing, and polishing machine.
Assignee: ROBERT H LANGSTON
•
Filing: 1906-09-08
•
Granted: 1910-10-11
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Expires: 1926-09-08
Abstract
No abstract record available.
Inventors
- 👤 William H Strange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:57
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4063; A47L11/4069
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) | 1913-10-10 | 1914-04-11 | 1914-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-10-10 | 1918-04-11 | 1918-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-10-10 | 1922-04-11 | 1922-10-11 | $7700.00 | Window Closed / Lapsed |