US3228754A
Expired / Lapsed
US
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Circulating concentrating evaporation for caustic regeneration
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1962-10-22
•
Granted: 1966-01-11
•
Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 William K Robbins
- 👤 James O Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:15
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/0082; Y; Y10; Y10S; Y10S159/00; Y10S159/33; Y10S159/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3075578A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |