US3022209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding butted pipe sections of polyethylene to form a reinforced joint
Assignee: Phillips Petroleum Co
•
Filing: 1956-11-23
•
Granted: 1962-02-20
•
Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Paul E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:21
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5229; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/28; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/114; B29C66/1142; B29C66/5221; B29C66/63; B29C66/634; B29C66/70; B29C66/71; B29C66/73; B29C66/731; B29C66/7311; B29C66/73113; B29C66/735; B29C66/7352; B29C66/737; B29C66/7377; B29C66/73773; B29C66/73774; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/828; B29C66/8286; B29C66/90; B29C66/92; B29C66/924; B29C66/9241; B29C66/929; B29C65/10; B29C65/12; B29C65/125; B29C65/20; B29C66/73115; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0608; B29K2023/065; B29K2105/00; B29K2105/0085; B29K2995/00; B29K2995/0037; B29K2995/0041; B29L; B29L2031/00; B29L2031/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD FOR WELDING SECTIONS OF PIPE OF ETHYLENE POLYMERS HAVING A CRYSTALLINITY OF AT LEAST ABOUT 75 PERCENT WHICH COMPRISES BUTTING SECTIONS OF SAID PIPE TOGETHER FIRMLY TO FORM A JOINT; ENCASING THE JOINT IN A SLEEVE CONSISTING OF ETHYLENE POLYMERS HAVING A CRYSTALLINITY OF AT LEAST ABOUT 75 PERCENT; APPLYING HEAT AT A TEMPERATURE SUFFICIENT TO SOFTEN SAID POLYMERS AND APPLYING EXTERNAL PRESSURE IN THE RANGE OF 10 TO 100 P.S.I. TO SAID JOINT TO SOFTEN SAID SLEEVE AND ALLOWING SAID SLEEVE TO COOL BEFORE RELEASING THE PRESSURE.
Claim 2
Independent Claim
90 words
A METHOD FOR WELDING SECTIONS OF PIPE OF ETHYLENE POLYMERS HAVING A CRYSTALLINITY OF AT LEAST ABOUT 75 PERCENT WHICH COMPRISES BUTTING SECTIONS OF SAID PIPE TOGETHER FIRMLY TO FORM A JOINT; ENCASING THE JOINT IN A SLEEVE CONSISTING OF ETHYLENE POLYMERS HAVING A CRYSTALLINITY OF AT LEAST ABOUT 75 PERCENT; APPLYING HEAT AT A TEMPERATURE SUFFICIENT TO SOFTEN SAID POLYMERS AND APPLYING EXTERNAL PRESSURE IN THE RANGE OF 10 TO 100 P.S.I. TO SAID JOINT TO SOFTEN SAID SLEEVE AND ALLOWING SAID SLEEVE TO COOL BEFORE RELEASING THE PRESSURE.
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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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |