Patent US830613A successfully refreshed from Google Patents.
US830613A
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US
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Apparatus for liquefying air and other gases.
Assignee: Individual
•
Filing: 1901-01-12
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Granted: 1906-09-11
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Expires: 1921-01-12
Abstract
No abstract record available.
Inventors
- 👤 Raoul Pierre Pictet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:03
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/0002; F25J1/0012; F25J1/003; F25J1/0032; F25J1/0035; F25J1/006; F25J1/008; F25J1/0085; F25J1/0097; F25J1/02; F25J1/0203; F25J1/0205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1909-09-10 | 1910-03-12 | 1910-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-09-10 | 1914-03-12 | 1914-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-09-10 | 1918-03-12 | 1918-09-11 | $7700.00 | Window Closed / Lapsed |