Patent US2663857A successfully refreshed from Google Patents.
US2663857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curve follower
Assignee: AT&T Inc
•
Filing: 1951-10-25
•
Granted: 1953-12-22
•
Expires: 1971-10-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Holcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:28
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/12; G05B19/124; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/301624; Y10T409/30168; Y10T409/301792
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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |