US2789456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible fastener having a crown spring head
Assignee: Individual
•
Filing: 1954-12-14
•
Granted: 1957-04-23
•
Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Abbott H Brush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:06
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US998781A
Cited
GB190818353A
Cited
US1476836A
Cited
US1453471A
Cited
US1540508A
Cited
US1958120A
Cited
US2033100A
Cited
US2350315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |