US3499931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of a mixture of primary alkanolamines and secondary alkanolamines
Assignee: Commercial Solvents Corp
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Filing: 1967-10-13
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Granted: 1970-03-10
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Expires: 1987-10-13
Abstract
No abstract record available.
Inventors
- 👤 John B Tindall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:53
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/10
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |