Patent US2677369A successfully refreshed from Google Patents.
US2677369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treatment of the spinal column
Assignee: Individual
•
Filing: 1952-03-26
•
Granted: 1954-05-04
•
Expires: 1972-03-26
Abstract
No abstract record available.
Inventors
- 👤 Fred L Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:30
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4405; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7062; A61F2/442; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30118; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/30841; A61F2002/30845; A61F2002/30878; A61F2002/30879; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00029
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1401056A
Cited
US1973240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |