US2443987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work holder
Assignee: ADELA H CALHOUN
•
Filing: 1945-10-13
•
Granted: 1948-06-22
•
Expires: 1965-10-13
Abstract
No abstract record available.
Inventors
- 👤 Morrison Clifford
- 👤 Joseph F Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:48
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005; B23; B23Q; B23Q3/00; B23Q3/02; B23Q3/06; B23Q3/08; B23Q3/088; Y; Y10; Y10S; Y10S264/00; Y10S264/78; Y10S409/00; Y10S409/903; Y10T; Y10T279/00; Y10T279/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US822096A
Cited
US1041028A
Cited
US1082134A
Cited
US1294103A
Cited
US2200536A
Cited
US2133518A
Cited
US2367839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |