Patent US4904247A successfully refreshed from Google Patents.
US2860174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic transportation of solid materials
Assignee: Phillips Petroleum Co
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Filing: 1954-02-08
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Granted: 1958-11-11
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Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 John W Begley
- 👤 Robert L Mcintire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:10
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD OF OPERATING A GAS LIFT ELEVATOR WHICH COMPRISING SUPPLYING PARTICULATE SOLID MATERIAL TO THE LOWER PORTION OF A GAS LIFT CONDUIT, PASSING A STREAM OF LIFT GAS INTO THE LOWER PORTION OF SAID CONDUIT, ENTRAPPING SOLID MATERIAL IN SAID STREAM OF LIFT GAS, THEREBY RAISING SAID SOLID MATERIAL TO THE UPPER END OF SAID CONDUIT, CONTINUOUSLY MEASURING A FIRST VARIABLE PROPORTIONAL TO THE AMOUNT OF SOLID MATERIAL FLOWING IN SAID CONDUIT PER UNIT TIME, SUPPLYING LIFT GAS TO THE LOWER PORTION OF SAID CON-
Claim 2
Independent Claim
86 words
A METHOD OF OPERATING A GAS LIFT ELEVATOR WHICH COMPRISING SUPPLYING PARTICULATE SOLID MATERIAL TO THE LOWER PORTION OF A GAS LIFT CONDUIT, PASSING A STREAM OF LIFT GAS INTO THE LOWER PORTION OF SAID CONDUIT, ENTRAPPING SOLID MATERIAL IN SAID STREAM OF LIFT GAS, THEREBY RAISING SAID SOLID MATERIAL TO THE UPPER END OF SAID CONDUIT, CONTINUOUSLY MEASURING A FIRST VARIABLE PROPORTIONAL TO THE AMOUNT OF SOLID MATERIAL FLOWING IN SAID CONDUIT PER UNIT TIME, SUPPLYING LIFT GAS TO THE LOWER PORTION OF SAID CON-
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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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |