US3192080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of welds
Assignee: Kemwell AG
•
Filing: 1963-04-30
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Granted: 1965-06-29
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Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Christopher N Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:08
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50; Y; Y10; Y10S; Y10S164/00; Y10S164/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF HEAT-TREATING A WELD JOINING TWO LENGTHS OF METAL PIPE WHICH COMPRISES LOCATING, AS A FIRST SLEEVE ROUND THE WELD AREA OF THE PIPES, A BODY OF A EXOTHERMIC COMPOSITION, LOCATING AT THE ENDS OF SAID SLEEVE SLEEVES OF HEAT-INSULATING MATERIAL WHICH SURROUND THE PIPE, LOCATING AT THE OUTER ENDS OF SAID-INSULATING SLEEVES SECONDARY SLEEVES OF AN EXOTHERMIC COMPOSITION, IGNITING THE FIRST SAID SLEEVE AND, BY CONDUCTION OF HEAT FROM THE BURNING FIRST SLEEVE IGNITING THE SECONDARY SLEEVES, AND ALLOWING THE WHOLE ASSEMBLY OF SLEEVES TO REMAIN IN SITU UNTIL COOLED DOWN.
Claim 2
Independent Claim
94 words
A METHOD OF HEAT-TREATING A WELD JOINING TWO LENGTHS OF METAL PIPE WHICH COMPRISES LOCATING, AS A FIRST SLEEVE ROUND THE WELD AREA OF THE PIPES, A BODY OF A EXOTHERMIC COMPOSITION, LOCATING AT THE ENDS OF SAID SLEEVE SLEEVES OF HEAT-INSULATING MATERIAL WHICH SURROUND THE PIPE, LOCATING AT THE OUTER ENDS OF SAID-INSULATING SLEEVES SECONDARY SLEEVES OF AN EXOTHERMIC COMPOSITION, IGNITING THE FIRST SAID SLEEVE AND, BY CONDUCTION OF HEAT FROM THE BURNING FIRST SLEEVE IGNITING THE SECONDARY SLEEVES, AND ALLOWING THE WHOLE ASSEMBLY OF SLEEVES TO REMAIN IN SITU UNTIL COOLED DOWN.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |