US2421769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of expanding hollow fasteners
Assignee: Individual
•
Filing: 1943-10-09
•
Granted: 1947-06-10
•
Expires: 1963-10-09
Abstract
No abstract record available.
Inventors
- 👤 Richard C Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:44
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/04; F16B19/08; F16B19/12; B; B21; B21J; B21J15/00; B21J15/02; B21J15/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1445583A
Cited
US1400401A
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US2038913A
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US2102320A
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US2207936A
Cited
US2342732A
Cited
US2342866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-09 | 1950-12-09 | 1951-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-09 | 1954-12-09 | 1955-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-09 | 1958-12-09 | 1959-06-10 | $7700.00 | Window Closed / Lapsed |