US2574440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated knife
Assignee: Individual
•
Filing: 1949-07-01
•
Granted: 1951-11-06
•
Expires: 1969-07-01
Abstract
No abstract record available.
Inventors
- 👤 James B Smith
- 👤 James Q Sidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
B; B26; B26B; B26B7/00; B26B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB268631A
Cited
US2051684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |