Patent US3577987A successfully refreshed from Google Patents.
US3577987A
Expired / Lapsed
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Article having an integral elongated appendage, and method of manufacturing the same
Assignee: Hallmark Plastics Inc
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Filing: 1967-11-06
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Granted: 1971-05-11
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Expires: 1987-11-06
Abstract
Abstract An article is manufactured by molding of a polyolefin material a body portion from which extends an integral elongated appendage portion that is subsequently stretched to increase its length, reduce its cross-sectional area and increase its unit tensile strength.
Inventors
- 👤 Paul H Bronnenkant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:20
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A01; A01K; A01K85/00; B; B29; B29C; B29C55/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2925
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
A method, comprising molding of a polyolefin material having a principally crystalline structure an article including a body portion and an appendage portion integral therewith which projects therefrom and has a smaller dimension in at least one transverse direction, said appendage portion having an elongated part one end of which is connected to said body portion and a head part connected to the other end of said elongated part, placing a support against said body portion adjacent its connection to said elongated part, placing another support against said head part adjacent its connection to said elongated part, and moving apart said supports only in the direction of the longitudinal extent of said elongated part to stretch only said elongated part into increased length and decreased crosssectional area.
Claim 2
Independent Claim
127 words
A method, comprising molding of a polyolefin material having a principally crystalline structure an article including a body portion and an appendage portion integral therewith which projects therefrom and has a smaller dimension in at least one transverse direction, said appendage portion having an elongated part one end of which is connected to said body portion and a head part connected to the other end of said elongated part, placing a support against said body portion adjacent its connection to said elongated part, placing another support against said head part adjacent its connection to said elongated part, and moving apart said supports only in the direction of the longitudinal extent of said elongated part to stretch only said elongated part into increased length and decreased crosssectional area.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein said supports are moved apart at a rate insufficient to break said elongated part.
Claim 4
Dependent Claim
29 words
A method according to claim 2 wherein said supports are moved apart until said elongated part has been reduced to a cross-sectional area substantially uniform throughout its increased length.
Claim 5
Dependent Claim
61 words
An article of manufacture made of a polyolefin material having a principally crystalline structure comprising a body portion and an elongated appendage portion integral with said body portion and projecting therefrom and having a smaller dimension in at least one transverse direction, the unit tensile strength or yield point of said appendage portion being greater than that of said body portion.
Claim 6
Dependent Claim
61 words
An article of manufacture made of a polyolefin material having a principally crystalline structure comprising a body portion and an elongated appendage portion integral with said body portion and projecting therefrom and having a smaller dimension in at least one transverse direction, the unit tensile strength or yield point of said appendage portion being greater than that of said body portion.
Claim 7
Dependent Claim
31 words
An article of manufacture according to claim 4 wherein said unit tensile strength or yield point of said appendage portion is at least about eight times that of said body portion.
Claim 8
Dependent Claim
60 words
An article of manufacture according to claim 4 wherein the article is an intrauterine device in which said body portion is a barlike body curved in a substantially flat plane in the shape of a large S continuing into a smaller S, and said integral appendage portion at one end extends from the free end portion of said smaller S.
Claim 9
Independent Claim
106 words
A method of producing a one-piece article havinG portions of different dimensions and unit tensile strengths or yield points, which comprises the steps of molding a polyolefin material having a principally crystalline structure into the form of a body portion and an integral elongated appendage portion which projects from said body portion and has a smaller dimension in at least one transverse direction, and applying a stretching force only to said appendage portion only in the direction of its longitudinal extent to increase its length and decrease its cross-sectional area and also to increase its tensile strength or yield point over that of said body portion.
Claim 10
Independent Claim
106 words
A method of producing a one-piece article havinG portions of different dimensions and unit tensile strengths or yield points, which comprises the steps of molding a polyolefin material having a principally crystalline structure into the form of a body portion and an integral elongated appendage portion which projects from said body portion and has a smaller dimension in at least one transverse direction, and applying a stretching force only to said appendage portion only in the direction of its longitudinal extent to increase its length and decrease its cross-sectional area and also to increase its tensile strength or yield point over that of said body portion.
Claim 11
Dependent Claim
36 words
A method of producing an article as set forth in claim 7 wherein said stretching force is applied only until said appendage portion has been reduced to a substantially uniform cross sectional area throughout its length.
References Cited (Backward Citations)
US3144430A
Cited
US3233019A
Cited
US3359983A
Cited
GB1080577A
Cited
US3380122A
Cited
US3382869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |