US3454488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweetening process utilizing ion exchange compositions
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1967-09-27
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Granted: 1969-07-08
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Expires: 1987-09-27
Abstract
No abstract record available.
Inventors
- 👤 William R Lewis
- 👤 Wilmer L Bird
- 👤 Morris Mindick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:59
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; B01J29/00; B01J29/04; B01J29/06; B01J29/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |