Patent US2698351A successfully refreshed from Google Patents.
US2698351A
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Purification of phosphoric acid polymer feed stock
Assignee: Standard Oil Development Co
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Filing: 1950-12-22
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Granted: 1954-12-28
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Expires: 1970-12-22
Abstract
No abstract record available.
Inventors
- 👤 Chauncey C Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:35
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C11/00; C07C11/02; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF REMOVING NITROGEN COMPOUNDS FROM A STREAM OF LOW-BOILING HYDROCARBONS CONTAINING SMALL AMOUNTS OF WATER; MERCAPTANS AND NITROGEN COMPOUNDS, WHICH COMPRISES CONTACTING THE HYDROCARBONS CONTAINING NITROGEN COMPOUNDS WITH SILICA GEL AT CONDITIONS ADAPTED TO ADSORB SAID NITROGEN COMPOUNDS ON SAID GEL, SAID WATER AND MERCAPTANS BEING REMOVED FROM SAID STREAM BEFORE SAID STEEAM CONTACTS SILICA GEL.
Claim 2
Independent Claim
58 words
THE METHOD OF REMOVING NITROGEN COMPOUNDS FROM A STREAM OF LOW-BOILING HYDROCARBONS CONTAINING SMALL AMOUNTS OF WATER; MERCAPTANS AND NITROGEN COMPOUNDS, WHICH COMPRISES CONTACTING THE HYDROCARBONS CONTAINING NITROGEN COMPOUNDS WITH SILICA GEL AT CONDITIONS ADAPTED TO ADSORB SAID NITROGEN COMPOUNDS ON SAID GEL, SAID WATER AND MERCAPTANS BEING REMOVED FROM SAID STREAM BEFORE SAID STEEAM CONTACTS SILICA GEL.
References Cited (Backward Citations)
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US2216549A
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US2384311A
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US2441572A
Cited
US2456119A
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US2457146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |