US2843928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an expandable fastener
Assignee: Townsend Co
•
Filing: 1954-10-27
•
Granted: 1958-07-22
•
Expires: 1974-10-27
Abstract
No abstract record available.
Inventors
- 👤 John E Gandy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:06
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/58; B21K1/60; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190708754A
Cited
US918193A
Cited
US1578172A
Cited
DE434789C
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US1978371A
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US2006813A
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US2182092A
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US2146923A
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US2586336A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |