US2619336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas separation apparatus
Assignee: Air Products Inc
•
Filing: 1949-02-02
•
Granted: 1952-11-25
•
Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:31
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB169605A
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FR523735A
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US1664483A
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US1725925A
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US1748411A
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US1886957A
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US1814125A
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US1753429A
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US1958383A
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US1865172A
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US2038451A
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US2241370A
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US2286786A
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US2241114A
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US2494337A
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US2366958A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |