Patent US2769840A successfully refreshed from Google Patents.
US2769840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complexes of higher alkanol amines and boron trifluoride
Assignee: Individual
•
Filing: 1951-12-29
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Granted: 1956-11-06
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Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Frank J Sowa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
C; C07; C07F; C07F5/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A COMPOUND HAVING THE COMPOSITION INDICATED BY THE FORMULA
Claim 2
Dependent Claim
9 words
A COMPOUND HAVING THE COMPOSITION INDICATED BY THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |