US2656857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated pipe
Assignee: POMPES NOEL SOC
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Filing: 1947-07-26
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Granted: 1953-10-27
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Expires: 1967-07-26
Abstract
No abstract record available.
Inventors
- 👤 Cavallier Jean Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:03
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/12; F16L15/00; F16L15/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/139; Y10T428/1393
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A PIPE WITH AT LEAST ONE SCREW-THREADED END PORTION WHICH IS COVERED WITH A LUBRICATING, SEALING AND PROTECTING PLASTIC COATING WHICH CONTAINS AT LEAST A SOLVENT HAVING A HIGH BOILING POINT, THE WHOLE INTERNAL AND EXTERNAL UNTHREADED SURFACE OF SAID PIPE BEING COVERED WITH A THIN PROTECTING PLASTIC COVERING AND HAVING THE SAME CONSTITUENTS AS THE COATING BUT, THE THICKNESS, SOLVENT CONTENT AND PLASTICITY OF SAID COVERING BEING SMALLER THAN THAT OF SAID COATING.
Claim 2
Dependent Claim
74 words
A PIPE WITH AT LEAST ONE SCREW-THREADED END PORTION WHICH IS COVERED WITH A LUBRICATING, SEALING AND PROTECTING PLASTIC COATING WHICH CONTAINS AT LEAST A SOLVENT HAVING A HIGH BOILING POINT, THE WHOLE INTERNAL AND EXTERNAL UNTHREADED SURFACE OF SAID PIPE BEING COVERED WITH A THIN PROTECTING PLASTIC COVERING AND HAVING THE SAME CONSTITUENTS AS THE COATING BUT, THE THICKNESS, SOLVENT CONTENT AND PLASTICITY OF SAID COVERING BEING SMALLER THAN THAT OF SAID COATING.
Claim 3
Independent Claim
176 words
A METHOD FOR COATING A PIPE HAVING AT LEAST ONE SCREW-THREADED END PORTION WHICH METHOD CONSISTS IN IMMERSING THE PIPE IN A BATH OF THE FOLLOWING COMPOSITION BY WEIGHT: ABOUT 60% COAL TAR PITCH AND ABOUT 40% ANTHRACENE OIL, MAINTAINING SAID BATH AT A TEMPERATURE BETWEEN 110* AND 130* C., KEEPING THE PIPE IMMERSED IN SAID BATH UNTIL THE TEMPERATURE OF THE PIPE IS EQUAL TO THAT OF THE BATH, REMOVING THE PIPE FROM SAID BATH, SAID PIPE BEING COMPLETELY COVERED WITH THE COATING COMPOSITION, GRADUALLY COOLING THE PIPE AND ITS COATING AFTER REMOVAL FROM SAID BATH, THUS FORMING ON THE SCREW-THREADED END PORTION OF THE PIPE A LUBRICATING, SEALING AND PROTECTIVE PLASTIC COATING WHICH HAS THE FOLLOWING COMPOSITION BY WEIGHT: ABOUT 80% COAL TAR PITCH AND ABOUT 20% ANTHRACENE OIL, WHEREAS THE ENTIRE INTERNAL AND EXTERNAL UNTHREADED SURFACE OF THE PIPE IS COVERED WITH A PLASTIC PROTECTIVE COVERING WHICH IS THINNER THAN THE COATING AT THE SCREWTHREADED PORTION AND HAS THE FOLLOWING COMPOSITION BY WEIGHT: ABOUT 90% COAL TAR PITCH AND ABOUT 10% ANTHRACENE OIL.
Claim 4
Independent Claim
176 words
A METHOD FOR COATING A PIPE HAVING AT LEAST ONE SCREW-THREADED END PORTION WHICH METHOD CONSISTS IN IMMERSING THE PIPE IN A BATH OF THE FOLLOWING COMPOSITION BY WEIGHT: ABOUT 60% COAL TAR PITCH AND ABOUT 40% ANTHRACENE OIL, MAINTAINING SAID BATH AT A TEMPERATURE BETWEEN 110* AND 130* C., KEEPING THE PIPE IMMERSED IN SAID BATH UNTIL THE TEMPERATURE OF THE PIPE IS EQUAL TO THAT OF THE BATH, REMOVING THE PIPE FROM SAID BATH, SAID PIPE BEING COMPLETELY COVERED WITH THE COATING COMPOSITION, GRADUALLY COOLING THE PIPE AND ITS COATING AFTER REMOVAL FROM SAID BATH, THUS FORMING ON THE SCREW-THREADED END PORTION OF THE PIPE A LUBRICATING, SEALING AND PROTECTIVE PLASTIC COATING WHICH HAS THE FOLLOWING COMPOSITION BY WEIGHT: ABOUT 80% COAL TAR PITCH AND ABOUT 20% ANTHRACENE OIL, WHEREAS THE ENTIRE INTERNAL AND EXTERNAL UNTHREADED SURFACE OF THE PIPE IS COVERED WITH A PLASTIC PROTECTIVE COVERING WHICH IS THINNER THAN THE COATING AT THE SCREWTHREADED PORTION AND HAS THE FOLLOWING COMPOSITION BY WEIGHT: ABOUT 90% COAL TAR PITCH AND ABOUT 10% ANTHRACENE OIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |