Patent US2679332A successfully refreshed from Google Patents.
US2679332A
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Valve protector for gas cylinders
Assignee: PYROFAX GAS CORP
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Filing: 1949-05-18
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Granted: 1954-05-25
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Expires: 1969-05-18
Abstract
No abstract record available.
Inventors
- 👤 Frank F Humbarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:59
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/10; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1094; Y10T292/20; Y10T292/221; Y10T292/223; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/554; Y10T70/5562; Y10T70/5575; Y10T70/558; Y10T70/5584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1555759A
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US1792622A
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US1807527A
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US1797765A
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US1790130A
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US2084231A
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US2095227A
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US2115947A
Cited
US2105135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |