Patent US4731760A successfully refreshed from Google Patents.
Patent US934314A successfully refreshed from Google Patents.
Patent US2817108A successfully refreshed from Google Patents.
US2817108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retaining device for channel strips of spirally wound brushes
Assignee: PPG Industries Inc
•
Filing: 1955-01-18
•
Granted: 1957-12-24
•
Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Van Clief
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:33
CPC Classifications
A; A46; A46B; A46B13/00; A46B13/001; A46B13/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |