US3494836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage falling film flash evaporator for producing fresh water
Assignee: SPINTECH INDUSTRIES Inc
•
Filing: 1965-09-02
•
Granted: 1970-02-10
•
Expires: 1985-09-02
Abstract
No abstract record available.
Inventors
- 👤 Ferris C Standiford Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:51
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/06; B01D3/065; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/06; Y; Y10; Y10S; Y10S159/00; Y10S159/02; Y10S159/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2159303A
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US2803589A
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US3111462A
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US3165452A
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US3218241A
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US3152053A
Cited
US3216910A
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US3244601A
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US3329583A
Cited
US3249517A
Cited
US3312601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |