US2696718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of thermophore pellets in air rectification
Assignee: Hydrocarbon Research Inc
•
Filing: 1947-02-20
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Granted: 1954-12-14
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Expires: 1967-02-20
Abstract
No abstract record available.
Inventors
- 👤 Paul W Garbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
F; F25; F25J; F25J5/00; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905; Y10S62/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1178667A
Cited
US1871166A
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GB525197A
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US2460859A
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US2560469A
Cited
US2537044A
Cited
US2561720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |