Patent US3148689A successfully refreshed from Google Patents.
US3148689A
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US
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Method and system for gas transmission
Assignee: Colorado Interstate Gas Co LLC
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Filing: 1960-11-22
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Granted: 1964-09-15
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Expires: 1980-11-22
Abstract
No abstract record available.
Inventors
- 👤 David W Bean
- 👤 Eagleton Harold Norman
- 👤 Robert R Olson
- 👤 Jr Otto Praeger
- 👤 Burt P Schaberg
- 👤 Donald J Vinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/032; B08B9/0321; B08B9/0328; B08B9/04; B08B9/053; B08B9/055; B08B9/0551; B08B9/057; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/4891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD FOR PURGING LIQUID FROM A PIPELINE HAVING A PLURALITY OF DIFFERENT PIPE DIAMETERS WHICH COMPRISES INSERTING INTO A SMALLER DIAMETER OF SAID PIPELINE A FIRST MOVABLE PLUG HAVING SUBSTANTIALLY THE SAME DIAMETER AS THE SAID SMALLER DIAMETER, APPLYING FLUID MEASURE TO SAID FIRST MOVABLE PLUG TO FORCE IT THROUGH SAID SMALLER DIAMETER OF SAID PIPELINE INTO A LARGER DIAMETER OF SAID PIPELINE, INSERTING INTO THE UPSTREAM END OF SAID LARGER DIAMETER OF SAID PIPELINE AND UPSTREAM OF SAID FIRST MOVABLE PLUG A SECOND MOVABLE PLUG HAVING SUBSTANTIALLY THE SAME DIAMETER AS THE SAID LARGER DIAMETER, AND APPLYING FLUID PRESSURE TO SAID SECOND MOVABLE PLUG TO FORCE IT THROUGH SAID LARGER DIAMETER OF SAID PIPELINE.
Claim 2
Independent Claim
116 words
A METHOD FOR PURGING LIQUID FROM A PIPELINE HAVING A PLURALITY OF DIFFERENT PIPE DIAMETERS WHICH COMPRISES INSERTING INTO A SMALLER DIAMETER OF SAID PIPELINE A FIRST MOVABLE PLUG HAVING SUBSTANTIALLY THE SAME DIAMETER AS THE SAID SMALLER DIAMETER, APPLYING FLUID MEASURE TO SAID FIRST MOVABLE PLUG TO FORCE IT THROUGH SAID SMALLER DIAMETER OF SAID PIPELINE INTO A LARGER DIAMETER OF SAID PIPELINE, INSERTING INTO THE UPSTREAM END OF SAID LARGER DIAMETER OF SAID PIPELINE AND UPSTREAM OF SAID FIRST MOVABLE PLUG A SECOND MOVABLE PLUG HAVING SUBSTANTIALLY THE SAME DIAMETER AS THE SAID LARGER DIAMETER, AND APPLYING FLUID PRESSURE TO SAID SECOND MOVABLE PLUG TO FORCE IT THROUGH SAID LARGER DIAMETER OF SAID PIPELINE.
References Cited (Backward Citations)
US2454259A
Cited
US2796878A
Cited
US2745231A
Cited
US2851164A
Cited
US2941537A
Cited
US2953157A
Cited
US2953158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |