US2843138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid proportioner
Assignee: California Research LLC
•
Filing: 1954-12-27
•
Granted: 1958-07-15
•
Expires: 1974-12-27
Abstract
No abstract record available.
Inventors
- 👤 Harris H Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; G; G05; G05D; G05D11/00; G05D11/006; G05D11/02; G05D11/13; G05D11/135; G05D11/138; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2496; Y10T137/2499; Y10T137/2509
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759996A
Cited
US1825631A
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US1946474A
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US2218533A
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US2311532A
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US2358748A
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US2360020A
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US2468603A
Cited
US2604108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |