US3081268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia synthesis gas process
Assignee: Individual
•
Filing: 1961-02-07
•
Granted: 1963-03-12
•
Expires: 1981-02-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Walton H Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:16
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/025; C01B3/32; C01B3/34; C01B3/38; C01B3/382; C01B3/386; C01B3/48; C01B2203/00; C01B2203/02; C01B2203/0205; C01B2203/0227; C01B2203/0233; C01B2203/0283; C01B2203/04; C01B2203/0415; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/06; C01B2203/068; C01B2203/08; C01B2203/0805; C01B2203/0811; C01B2203/0816; C01B2203/0822; C01B2203/0866; C01B2203/0872; C01B2203/0877; C01B2203/0888; C01B2203/0894; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/1258; C01B2203/1264; C01B2203/127; C01B2203/14; C01B2203/142; C01B2203/146; C01B2203/80; C01B2203/84; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129; Y02P30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE PRODUCTION OF AMMONIA SYNTHESIS GAS FROM HYDROCARBONS BY THE STEPS OF PRIMARY CATALYTIC REFORMING THE HYDROCARBONS WITH STEAM, SECONDARY CATALYTIC REFORMING WITH AIR THE PRODUCT OF SAID PRIMARY CATALYTIC REFORMING, AND SHIFT CONVERSION OF THE PRODUCT OF SAID SECONDARY CATALUTIC REFORMING, TO PRODUCE AMMONIA SYNTHESIS GAS CONTAINING APPROXIMATELY THREE MOLES OF HYDROGEN FOR EACH MOLE OF NITROGEN, THE IMPROVEMENT WHICH COMPRISES MAINTAINING IN THE PRIMARY CATALYTIC REFORMING STEP A STEAM TO CARBON RATIO OF 4.0 TO 8.0 AND MAINTAINING IN THE SECONDARY CATALYTIC REFORMING STEP A PRESSURE BETWEEN 270 AND 650 P.S.I.A.
Claim 2
Dependent Claim
94 words
IN THE PRODUCTION OF AMMONIA SYNTHESIS GAS FROM HYDROCARBONS BY THE STEPS OF PRIMARY CATALYTIC REFORMING THE HYDROCARBONS WITH STEAM, SECONDARY CATALYTIC REFORMING WITH AIR THE PRODUCT OF SAID PRIMARY CATALYTIC REFORMING, AND SHIFT CONVERSION OF THE PRODUCT OF SAID SECONDARY CATALUTIC REFORMING, TO PRODUCE AMMONIA SYNTHESIS GAS CONTAINING APPROXIMATELY THREE MOLES OF HYDROGEN FOR EACH MOLE OF NITROGEN, THE IMPROVEMENT WHICH COMPRISES MAINTAINING IN THE PRIMARY CATALYTIC REFORMING STEP A STEAM TO CARBON RATIO OF 4.0 TO 8.0 AND MAINTAINING IN THE SECONDARY CATALYTIC REFORMING STEP A PRESSURE BETWEEN 270 AND 650 P.S.I.A.
References Cited (Backward Citations)
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US2628890A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |