Patent US3294495A successfully refreshed from Google Patents.
US3294495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing difluoramine
Assignee: North American Aviation Corp
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Filing: 1959-09-15
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Granted: 1966-12-27
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Expires: 1979-09-15
Abstract
No abstract record available.
Inventors
- 👤 Emil A Lawton
- 👤 John Q Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/087; C01B21/088; C01B21/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF PREPARING DIFLUORAMINE COMPRISING THE STEPS OF FLUORINATING, WITH ELEMENTAL FLUORINE, A NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, BIUREA, BIURET, AMINOGUANIDINE, DIAMINOREA, 5-AMINOTETRAZOLE, GUANIDINE HYDROCHLORIDE, AND SEMICARBAZIDE HYDROCHLORIDE, HEATING THE LIQUID PRODUCTS OF SAID FLUORINATING STEP AND FRACTIONALLY CONDENSING GASEOUS PRODUCTS OF SAID HEATING STEP TO OBTAIN SUBSTANTIALLY PURE DIFLUORAMINE.
Claim 2
Independent Claim
55 words
A METHOD OF PREPARING DIFLUORAMINE COMPRISING THE STEPS OF FLUORINATING, WITH ELEMENTAL FLUORINE, A NITROGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, BIUREA, BIURET, AMINOGUANIDINE, DIAMINOREA, 5-AMINOTETRAZOLE, GUANIDINE HYDROCHLORIDE, AND SEMICARBAZIDE HYDROCHLORIDE, HEATING THE LIQUID PRODUCTS OF SAID FLUORINATING STEP AND FRACTIONALLY CONDENSING GASEOUS PRODUCTS OF SAID HEATING STEP TO OBTAIN SUBSTANTIALLY PURE DIFLUORAMINE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |