US2442067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing stop nuts
Assignee: PERFECTION PATENTS Inc
•
Filing: 1944-04-01
•
Granted: 1948-05-25
•
Expires: 1964-04-01
Abstract
No abstract record available.
Inventors
- 👤 John J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:24
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/64; B21K1/70; B21K1/707
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US321260A
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US1550282A
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US1714661A
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US1936598A
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US1990718A
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US1993137A
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US2002671A
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US2153681A
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US2206740A
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US2346456A
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US2351057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |