US2424871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for flaring tubing
Assignee: KEYSTONE MANUFACTURING Co
•
Filing: 1944-04-18
•
Granted: 1947-07-29
•
Expires: 1964-04-18
Abstract
No abstract record available.
Inventors
- 👤 Edward A Wenk
- 👤 Ruth B Wenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:05
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/02; B21D41/021; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5626; Y10T408/5627; Y10T408/56275; Y10T408/563; Y10T408/5633; Y10T408/56337
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US236365A
Cited
US626427A
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US641258A
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GB190108622A
Cited
US851491A
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US1270958A
Cited
US1720133A
Cited
US1783639A
Cited
US1795358A
Cited
US1976878A
Cited
US2132947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |