US3481242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One piece expansion fastener
Assignee: SAMUEL B TOPF
•
Filing: 1968-06-06
•
Granted: 1969-12-02
•
Expires: 1988-06-06
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Topf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:30
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/04; F16B19/08; F16B19/10; F16B19/1027; F16B19/1036; F16B19/1081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA667637A
Cited
US921037A
Cited
US3188905A
Cited
FR1335358A
Cited
US3213746A
Cited
US3279643A
Cited
US3350976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |