US3347873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of organic compounds
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-12-21
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Granted: 1967-10-17
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Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:08
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/04; C07D307/18; C07D307/22; C07D319/00; C07D319/10; C07D319/12; Y; Y10; Y10S; Y10S149/00; Y10S149/119
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
METHOD OF SEPARATING A SATURATED HIGHER NF2 ADDUCT OF AN UNSATURATED ORGANIC COMPOUND FROM A LOWER NF2 ADDUCT OF SAID COMPOUND HAVING A REMAINING DOUBLE BOND, SAID ADDUCTS BEING IN A MIXTURE AND SAID HIGHER NF2 ADUCT BEING DISTILLBLE UNDER VACUUM AT 0*C. TO 100*C., COMPRISING THE STEPS OF REACTING AT ABOUT -- 10* TO +10*C. THE LOWER NF2 ADDUCT IN THE MIXTURE WITH LIQUID N2O4 TO FORM A NITROGEN- AND OXYGEN-CONTAINING PRODUCT THAT IS LESS VOLATILE THAN THE SATURATED HIGHER NF2 ADDUCT, AND DISTILLING SAID HIGHER NF2 ADDUCT UNDER VACUUM FROM THE LESS VOLATILE NITROGEN- AND OXYGEN-CONTAINING PRODUCT.
Claim 2
Dependent Claim
33 words
THE METHOD OF CLAIM 3, IN WHICH THE HIGHER NF2 ADDUCT IS TETRAKIS NF2 ADDUCT OF FURAN AND THE LOWER NF2 ADDUCT IS BIS NF2 ADDUCT OF FURNA LEAVING A REMAINING DOUBLE BOND.
References Cited (Backward Citations)
US2586777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |