Patent US2861432A successfully refreshed from Google Patents.
US2861432A
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Extraction of oxygen from the atmosphere and like operations
Assignee: Individual
•
Filing: 1954-11-10
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Granted: 1958-11-25
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Expires: 1974-11-10
Abstract
No abstract record available.
Inventors
- 👤 Haselden Geoffrey Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:54
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04624; F25J3/0463; B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22; B01D3/24; B01D3/26; B01D3/28; B01J; B01J19/00; B01J19/32; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; F25J3/04006; F25J3/04078; F25J3/0409; F25J3/04151; F25J3/04187; F25J3/04193; F25J3/04206; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04303; F25J3/04763; F25J3/04866; F25J3/04896; F25J3/04903; F25J5/00; F25J5/002; F25J5/007; F28; F28F; F28F25/00; F28F25/02; F28F25/08; F28F25/087; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/3221; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32237; B01J2219/32241; B01J2219/324; B01J2219/32408; C01B2210/00; C01B2210/0043; C01B2210/0046; F25J2200/00; F25J2200/04; F25J2240/00; F25J2240/40; F25J2240/46; F25J2250/00; F25J2250/30; F25J2250/40; F25J2250/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |