US3139642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twisted tuft rotary brush
Assignee: Osborn Manufacturing Corp
•
Filing: 1961-05-03
•
Granted: 1964-07-07
•
Expires: 1981-05-03
Abstract
No abstract record available.
Inventors
- 👤 Brooks E Nelson
- 👤 Willard A Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:59
CPC Classifications
A; A46; A46B; A46B13/00; A46B13/001; A46B13/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A TWISTED TUFT ROTARY BRUSH COMPRISING A RING, A SERIES OF LOOPED TWISTED TUFTS THREADED ON SAID RING, AND
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |