US2879534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary brush
Assignee: Tennant Co
•
Filing: 1956-04-19
•
Granted: 1959-03-31
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Albert S Swanson
- 👤 Harlie J Kimmerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:38
CPC Classifications
A; A46; A46B; A46B13/00; A46B13/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US596715A
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US648527A
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US1482744A
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GB215707A
Cited
US1902113A
Cited
US2223681A
Cited
US2388867A
Cited
US2707792A
Cited
US2829700A
Cited
US2789075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |