US3398422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary brush for carpet scrubbing machine
Assignee: MULTI-CLEAN Inc
•
Filing: 1968-01-25
•
Granted: 1968-08-27
•
Expires: 1988-01-25
Abstract
No abstract record available.
Inventors
- 👤 Robert M Barry
- 👤 Anton J Reiling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:39
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4038; A47L11/32; A47L11/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756222A
Cited
US907842A
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US1526658A
Cited
US2689368A
Cited
US2999258A
Cited
US3181193A
Cited
US3233272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |