Patent US2945294A successfully refreshed from Google Patents.
US2945294A
Expired / Lapsed
US
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Method of making guard rings for gas cylinders
Assignee: Weatherhead Co
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Filing: 1957-06-14
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Granted: 1960-07-19
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Expires: 1977-06-14
Abstract
No abstract record available.
Inventors
- 👤 Louis B Courtot
- 👤 George E Tanker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:29
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/08; F17C13/084; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/03; F17C2201/032; F17C2201/05; F17C2201/058; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/0157; F17C2205/0165; F17C2205/018; F17C2205/03; F17C2205/0302; F17C2205/0308; F17C2205/0323; F17C2205/0329; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US661380A
Cited
US1237151A
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US2030772A
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US2339930A
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US2713872A
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US2707968A
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BE514045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |