Patent US3464278A successfully refreshed from Google Patents.
US3464278A
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Safety device for acetylene cylinder
Assignee: FREDERICK L PARNELL
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Filing: 1967-10-25
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Granted: 1969-09-02
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Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Parnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:07
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/12; F17C13/123; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0308; F17C2205/0311; F17C2205/0317; F17C2205/0323; F17C2205/0329; F17C2205/0338; F17C2221/00; F17C2221/01; F17C2221/018; F17C2260/00; F17C2260/04; F17C2260/042; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2637333A
Cited
US2841018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |