US3276929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a sleeved joint over shaped polyolefin bodies
Assignee: Evonik Operations GmbH
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Filing: 1961-08-21
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Granted: 1966-10-04
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Expires: 1981-08-21
Abstract
Abstract 965,467. Pipe joints. DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT. Aug. 17, 1961 [Aug. 20, 1960], No. 29744/61. Heading F2G. A process for uniting moulded elements, e.g. tubes, bars or strips, comprises swelling a moulded element in the form of a sleeve of a cross-linked polyolefine or a copolymer containing a polyolefine in a swelling agent, so that expansion takes place, pushing it over one or more moulded elements of cross-linked, unswelled polyolefine, the elements being provided at the places to be united with a reaction adhesive and shrinking it in position by evaporation of the swelling agent to effect sticking together of the component parts. Fillers may be incorporated in the moulded elements and the evaporation of the swelling agent may be accelerated by heat. A number of reaction adhesives and swelling agents are described. Specifications 830,835, 965,466 and Belgian Specification 585,269 are referred to.
Inventors
- 👤 Ferch Horst Karl Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:45
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C61/00; B29C61/003; B29C61/06; B29C65/00; B29C65/48; B29C65/4805; B29C65/483; B29C65/66; B29C65/68; B29C65/72; B29C66/114; B29C66/1142; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5221; B29C66/5229; C; C08; C08F; C08F2/00; C08F20/00; C08F20/62; C08F255/00; C08F255/02; C08F291/00; C09; C09J; C09J4/00; C09J4/06; B29C66/70; B29C66/71; Y; Y10; Y10S; Y10S285/00; Y10S285/909; Y10S285/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A METHOD OF JOINING SHAPED BODIES OF CROSS-LINKED POLYOLEFINS OF MONOMERS HAVIING UP TO 5 CARBON ATOMS WHICH COMPRISES (A) APPLYING A CURABLE REACTION ADHESIVE CONTAINING AT LEAST ONE POLYMERIZABLE COMPONENT TO THE SURFACE OF ONE OF THE SHAPED CROSS-LINKED POLYOLEFIN BODIES TO BE JOINED, (B) SWELLING ANOTHER OF THE SHAPED BODIES OF CROSSLINKED POLYOLEFIN IN THE FORM OF A SLEEVE, WHICH IN UNSWOLLEN STATE HAS AN INTERIOR CROSS-SECTIO SMALLER THAN THE EXTERIOR CROSS-SECTION OF THE FIRST MENTIONED BODY, IN A SWELLING AGENT WHICH CONTAINS AT LEAST ONE ORGANIC POLYMERIZABLE MONOMERIC SUBSTANCE HAVING AT LEAST ONE ETHYLENICALLY UNSATURATED CARBON TO CARBON BOND WHICH IS COPOLYMERIZABLE WITHAT LEAST ONE COMPONENT OF SAID REACTION ADHESIVE, UNTIL SAID INTERIOR CROSS-SECTION IS SUCH THAT IT CAN BE SLIPPED OVER SAID FIRST SHAPED BODY TO WHICH SAID ADHESIVE HAS BEEN APPLIED WHILE SAID FIRST SHAPED BODY IS IN UNSWOLLEN STATE, (C) SLIPPING SAID SWOLLEN SLEEVE OVER THE SURFACE OF SAID FIRST SHAPED BODY TO WHICH THE ADHESIVE HAS BEEN APPLIED WHILE SAID FIRST SHAPED BODY IS IN UNSWOLLEN STATE, (D) EVAPORATING A PORTION OF SAID SWELLING AGENT TO SHRINK THE SLEEVE ON THE FIRST MENTIONED BODY, THE REMAINING PORTION OF THE SELLING AGENT BEING TAKEN UP IN CROSS-LINKING AND COPOLYMERIZATION WITH AT LEAST ONE COMPONENT O THE REACTION ADHESIVE AND (E) CURING THE REACTION ADHESIVE.
Claim 2
Independent Claim
220 words
A METHOD OF JOINING SHAPED BODIES OF CROSS-LINKED POLYOLEFINS OF MONOMERS HAVIING UP TO 5 CARBON ATOMS WHICH COMPRISES (A) APPLYING A CURABLE REACTION ADHESIVE CONTAINING AT LEAST ONE POLYMERIZABLE COMPONENT TO THE SURFACE OF ONE OF THE SHAPED CROSS-LINKED POLYOLEFIN BODIES TO BE JOINED, (B) SWELLING ANOTHER OF THE SHAPED BODIES OF CROSSLINKED POLYOLEFIN IN THE FORM OF A SLEEVE, WHICH IN UNSWOLLEN STATE HAS AN INTERIOR CROSS-SECTIO SMALLER THAN THE EXTERIOR CROSS-SECTION OF THE FIRST MENTIONED BODY, IN A SWELLING AGENT WHICH CONTAINS AT LEAST ONE ORGANIC POLYMERIZABLE MONOMERIC SUBSTANCE HAVING AT LEAST ONE ETHYLENICALLY UNSATURATED CARBON TO CARBON BOND WHICH IS COPOLYMERIZABLE WITHAT LEAST ONE COMPONENT OF SAID REACTION ADHESIVE, UNTIL SAID INTERIOR CROSS-SECTION IS SUCH THAT IT CAN BE SLIPPED OVER SAID FIRST SHAPED BODY TO WHICH SAID ADHESIVE HAS BEEN APPLIED WHILE SAID FIRST SHAPED BODY IS IN UNSWOLLEN STATE, (C) SLIPPING SAID SWOLLEN SLEEVE OVER THE SURFACE OF SAID FIRST SHAPED BODY TO WHICH THE ADHESIVE HAS BEEN APPLIED WHILE SAID FIRST SHAPED BODY IS IN UNSWOLLEN STATE, (D) EVAPORATING A PORTION OF SAID SWELLING AGENT TO SHRINK THE SLEEVE ON THE FIRST MENTIONED BODY, THE REMAINING PORTION OF THE SELLING AGENT BEING TAKEN UP IN CROSS-LINKING AND COPOLYMERIZATION WITH AT LEAST ONE COMPONENT O THE REACTION ADHESIVE AND (E) CURING THE REACTION ADHESIVE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |