Patent US3515155A successfully refreshed from Google Patents.
US3515155A
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Gas mixture proportioner
Assignee: Airco Inc
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Filing: 1967-02-24
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Granted: 1970-06-02
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Mark P Haffner
- 👤 George R Spies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132; A; A61; A61M; A61M16/00; A61M16/10; A61M16/1005; A61M16/1015; A61M16/12; A61M16/20; A61M16/201; A61M16/202; B; B01; B01F; B01F23/00; B01F23/10; B01F23/19; B01F35/00; B01F35/80; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/24; A61M16/208; A61M16/209; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0352; Y10T137/2496; Y10T137/2703; Y10T137/2931; Y10T137/3115; Y10T137/3118
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |