Patent US2744272A successfully refreshed from Google Patents.
US2744272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-driven floor polisher
Assignee: Interstate Engineering Corp
•
Filing: 1950-11-02
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Granted: 1956-05-08
•
Expires: 1970-11-02
Abstract
No abstract record available.
Inventors
- 👤 William T Theis
- 👤 Leland W Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:04
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4038; A47L11/02; A47L11/20; A47L11/204; A47L11/206; A47L11/4063; A47L11/4069; A47L11/4094
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |