US2490634A
Expired / Lapsed
US
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Apparatus for controlling the concentration of solutions which tend to foam
Assignee: Honeywell International Inc
•
Filing: 1946-03-11
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Granted: 1949-12-06
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Expires: 1966-03-11
Abstract
No abstract record available.
Inventors
- 👤 Paul A Keene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/0018; A47L15/0055; A47L15/42; A47L15/44; A47L15/449; G; G05; G05D; G05D21/00; G05D21/02; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2453; A47L2401/00; A47L2401/30; A47L2501/00; A47L2501/07; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2509; Y10T137/8593; Y10T137/86187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2231211A
Cited
US2370609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |