Patent US2767727A successfully refreshed from Google Patents.
US2767727A
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Air-oxygen mixing apparatus for hospitals
Assignee: Union Carbide Corp
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Filing: 1952-02-09
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Granted: 1956-10-23
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Expires: 1972-02-09
Abstract
No abstract record available.
Inventors
- 👤 Byron H Acomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:46
CPC Classifications
A; A61; A61M; A61M16/00; B; B01; B01F; B01F23/00; B01F23/10; B01F23/19; B01F23/191; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F35/00; B01F35/20; B01F35/21; B01F35/211; B01F35/2111; F; F24; F24F; F24F6/00; F24F6/12; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1075408A
Cited
US1421843A
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US1421845A
Cited
US1592305A
Cited
US1933733A
Cited
US2162242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |