US2838268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracer
Assignee: Individual
•
Filing: 1955-05-04
•
Granted: 1958-06-10
•
Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 George E Ryckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:44
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/24; B23Q35/26; B23Q35/36; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303416; Y10T409/303472; Y10T409/30364
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675652A
Cited
US1124471A
Cited
US1997890A
Cited
US1959178A
Cited
US2283296A
Cited
US2397494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |