US2731659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor scrubbing machine
Assignee: Individual
•
Filing: 1952-12-08
•
Granted: 1956-01-24
•
Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 Coplen George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4088; A47L11/29; A47L11/30; A47L11/4036; A47L11/4044; A47L11/4063; A47L11/4069; A47L11/4077; A47L11/4083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1240799A
Cited
US1268963A
Cited
US1391754A
Cited
US1839824A
Cited
US1909338A
Cited
US1938068A
Cited
US2023588A
Cited
US2247993A
Cited
US2239183A
Cited
CH204494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |