Patent US4640113A successfully refreshed from Google Patents.
Patent US3538933A successfully refreshed from Google Patents.
US3538933A
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Fluid mixing device
Assignee: BOC Group Ltd
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Filing: 1968-08-05
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Granted: 1970-11-10
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:49
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; B; B01; B01F; B01F25/00; B01F25/20; B01F25/23; B01F23/00; B01F23/10; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2076; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/2164; Y10T137/2169
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |