Patent FR739312A successfully refreshed from Google Patents.
US3401938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrowhead attaching means
Assignee: WK 55 Inc
•
Filing: 1966-11-02
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Granted: 1968-09-17
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Expires: 1986-11-02
Abstract
No abstract record available.
Inventors
- 👤 Fred B Bear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:15
CPC Classifications
F; F42; F42B; F42B6/00; F42B6/02; F42B6/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2289284A
Cited
GB717353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |