Patent US2588807A successfully refreshed from Google Patents.
US2588807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Change-speed friction drive for record changers
Assignee: GE Healthcare UK Ltd
•
Filing: 1951-02-27
•
Granted: 1952-03-11
•
Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 Costa Harry Da
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:55
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/26; G11B19/265
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) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |