US3489650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular unit assembly for multi-stage flash distillation
Assignee: AMF Inc
•
Filing: 1967-02-13
•
Granted: 1970-01-13
•
Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 William Rodger Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/06; B01D3/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2078377A
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US3096256A
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US3228859A
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US3219553A
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US3216910A
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US3326280A
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US3214350A
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US3330739A
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US3304242A
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US3322648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |