Patent US2720255A successfully refreshed from Google Patents.
Patent US3193496A successfully refreshed from Google Patents.
US3193496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing nitrogen
Assignee: Gulf Research and Development Co
•
Filing: 1961-12-06
•
Granted: 1965-07-06
•
Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Guenther K Hartung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:31
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR REDUCING THE NITROGEN CONTENT OF A NITROGEN-CONTAINING PETROLEUM FRACTION WHICH COMPRISES CONTACTING SAID NITROGEN-CONTAINING PETROLEUM FRACTION WITH A MIXTURE OF AT LEAST ONE IRON HALIDE AND AT LEAST ONE ZINC HALIDE.
Claim 2
Dependent Claim
34 words
A PROCESS FOR REDUCING THE NITROGEN CONTENT OF A NITROGEN-CONTAINING PETROLEUM FRACTION WHICH COMPRISES CONTACTING SAID NITROGEN-CONTAINING PETROLEUM FRACTION WITH A MIXTURE OF AT LEAST ONE IRON HALIDE AND AT LEAST ONE ZINC HALIDE.
References Cited (Backward Citations)
US2138566A
Cited
US2925375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |