US2878181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing neutral oils
Assignee: Pure Oil Co
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Filing: 1957-12-30
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Granted: 1959-03-17
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 George W Ayers
- 👤 William A Krewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
C; C10; C10G; C10G19/00; C10G29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE PROCESS OF PREPARING PETEOLEUM OILS OF LOW NEUTRALIZATION NUMBER WHICH COMPRISES TREATING SAID PETROLEUM OIL WITH A BASIC NITROGEN COMPOUND CAPABLE OF AMIDE FORMATION IN THE PRESENCE OF N,N''-DICYCLOHEXYLCARBODIIMIDE AND SEPARATING THE OIL PHASE FROM THE REACTION PRODUCTS.
Claim 2
Dependent Claim
39 words
THE PROCESS OF PREPARING PETEOLEUM OILS OF LOW NEUTRALIZATION NUMBER WHICH COMPRISES TREATING SAID PETROLEUM OIL WITH A BASIC NITROGEN COMPOUND CAPABLE OF AMIDE FORMATION IN THE PRESENCE OF N,N''-DICYCLOHEXYLCARBODIIMIDE AND SEPARATING THE OIL PHASE FROM THE REACTION PRODUCTS.
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) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |