US3417840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: WALTER L FARNSWORTH JR
•
Filing: 1967-10-26
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Granted: 1968-12-24
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Expires: 1987-10-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter L Farnsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:28
CPC Classifications
A; A41; A41D; A41D19/00; A41D19/015; A41D19/01594; E; E06; E06C; E06C7/00; E06C7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US543464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |