Patent US3946979A successfully refreshed from Google Patents.
US2980733A
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Coordination complexes of urea and boron trifluoride and methods of producing the same
Assignee: Individual
•
Filing: 1954-07-12
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Granted: 1961-04-18
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Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Frank J Sowa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/766; C07; C07F; C07F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A WATER SOLUBLE COMPOUND HAVING A MELTING POINT OF 96* TO 98*C. AND CONSISTING OF FOUR MOLECULES OF UREA COMBINED WITH ONE MOLECULE OF BORON TRIFLUORIDE.
Claim 2
Dependent Claim
26 words
A WATER SOLUBLE COMPOUND HAVING A MELTING POINT OF 96* TO 98*C. AND CONSISTING OF FOUR MOLECULES OF UREA COMBINED WITH ONE MOLECULE OF BORON TRIFLUORIDE.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |