US2839049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive cytologic brush
Assignee: Individual
•
Filing: 1954-03-25
•
Granted: 1958-06-17
•
Expires: 1974-03-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth S Maclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:25
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/04; A61B2010/0216; A61B17/00; A61B17/32; A61B2017/320004; A61B2017/320012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711352A
Cited
US1776443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |