US2520518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work holder
Assignee: Individual
•
Filing: 1946-08-22
•
Granted: 1950-08-29
•
Expires: 1966-08-22
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:42
CPC Classifications
B; B23; B23Q; B23Q16/00; B23Q16/02; B23Q16/04; Y; Y10; Y10T; Y10T279/00; Y10T279/13; Y10T279/17; Y10T279/17411; Y10T279/17529; Y10T279/17547
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US525050A
Cited
US1260130A
Cited
US1273417A
Cited
US1461316A
Cited
US2186236A
Cited
US2335721A
Cited
US2341099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |