US3202562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of installing a liner in a couple-jointed conduit
Assignee: Pan American Petroleum Corp
•
Filing: 1961-11-15
•
Granted: 1965-08-24
•
Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Harold M Lang
- 👤 Earl R Jeunings
- 👤 George C Howard
- 👤 Lawrence B Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:38
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD FOR PREVENTING THE RUPTURE OF A THIN, COLLAPSIBLE FILM LINER WHEN THE LATTER IS PLACE IN A COUPLEJOINTED CONDUIT HAVING OBJECTIONABLE IRREGULARITIES ON THE INNER SURFACE THEREOF AND SUBJECTED TO ELEVATED PRESSURES, WHICH COMPRISES SPREADING OVER SAID SURFACE A THIN LAYER OF A THIXOTROPIC SUBSTANCE OF GREASE-LIKE CONSISTENCY, SAID LAYER HAVING A SUBSTANTIALLY UNIFORM SURFACE WHEREBY SAID IRREGULARITITES ARE COVERED THEREAFTER PLACING SAID LINER IN THE RESULTING INTERIORLY COATED CONDUIT, AND FORCING THE WALLS OF SAID LINER INTO SUBSTANTIALLY COMPLETE AND CONTINUOUS CONTACT WITH SAID LAYER.
Claim 2
Independent Claim
88 words
A METHOD FOR PREVENTING THE RUPTURE OF A THIN, COLLAPSIBLE FILM LINER WHEN THE LATTER IS PLACE IN A COUPLEJOINTED CONDUIT HAVING OBJECTIONABLE IRREGULARITIES ON THE INNER SURFACE THEREOF AND SUBJECTED TO ELEVATED PRESSURES, WHICH COMPRISES SPREADING OVER SAID SURFACE A THIN LAYER OF A THIXOTROPIC SUBSTANCE OF GREASE-LIKE CONSISTENCY, SAID LAYER HAVING A SUBSTANTIALLY UNIFORM SURFACE WHEREBY SAID IRREGULARITITES ARE COVERED THEREAFTER PLACING SAID LINER IN THE RESULTING INTERIORLY COATED CONDUIT, AND FORCING THE WALLS OF SAID LINER INTO SUBSTANTIALLY COMPLETE AND CONTINUOUS CONTACT WITH SAID LAYER.
References Cited (Backward Citations)
GB322834A
Cited
US2343225A
Cited
US2410681A
Cited
US2446243A
Cited
US2417881A
Cited
US2876154A
Cited
US3080269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |