US2771308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Puritan Compressed Gas Corp
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Filing: 1954-02-23
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Granted: 1956-11-20
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 James F Vitcha
- 👤 Arley C Hemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:54
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/22; F16L37/23; F16L37/08; F16L37/084; F16L37/086; F16L37/28; F16L37/38; F16L37/40; F16L37/42; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |