US4174782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow body made from a thermoplastic
Assignee: Solvay SA
•
Filing: 1978-02-06
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Granted: 1979-11-20
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Expires: 1998-02-06
Abstract
Abstract A hollow container of molecularly oriented thermoplastic material having a generally cylindrical form and provided with a base constituted by a series of annular toroidal sections of semicircular cross section and having alternating directions of curvature.
Inventors
- 👤 Marc Obsomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0223; B65D1/0261; B65D1/0276; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
110 words
In a hollow body made of an oriented thermoplastic material, which body is of generally cylindrical shape and includes a base and a side wall, the improvement wherein said base is oriented and is constituted by between three and 15 concentric annular toroidal sections of substantially semicircular cross section and having alternating directions of curvature from the periphery of said body inwards wherein the radially outermost one of said base sections is upwardly concave and joins directly onto said side wall of said hollow body and the diameter of the cross section of each of said annular sections is less than 20% of the maximum diameter of said side wall.
Claim 2
Dependent Claim
110 words
In a hollow body made of an oriented thermoplastic material, which body is of generally cylindrical shape and includes a base and a side wall, the improvement wherein said base is oriented and is constituted by between three and 15 concentric annular toroidal sections of substantially semicircular cross section and having alternating directions of curvature from the periphery of said body inwards wherein the radially outermost one of said base sections is upwardly concave and joins directly onto said side wall of said hollow body and the diameter of the cross section of each of said annular sections is less than 20% of the maximum diameter of said side wall.
Claim 3
Dependent Claim
52 words
An article as defined in claim 1 wherein the ratio of the maximum diameter of said side wall part to the developed length of the profile of said base along an intersection of said base with a plane perpendicular to said base and passing through its center is between 0.8 and 0.5.
Claim 4
Dependent Claim
28 words
An article as defined in claim 1 wherein those of said base sections near the center of said body are recessed relative to said radially outermost base section.
Claim 5
Dependent Claim
20 words
An article as defined in claim 3 wherein the general shape of the recessed portion of said base is concave.
Claim 6
Dependent Claim
24 words
An article as defined in claim 4 wherein the general shape of the recessed portion of said base is that of a spherical segment.
Claim 7
Dependent Claim
23 words
An article as defined in claim 1 wherein the diameters of the semicircular cross sections of all of said annular sections are equal.
Claim 8
Dependent Claim
28 words
An article as defined in claim 1 wherein the diameters of the semicircular cross sections of said annular sections increase progressively from the center of said base outwards.
Claim 9
Dependent Claim
33 words
An article as defined in claim 1 wherein said base is further constituted by an annular section of rectilinear cross section interposed between two of said annular toroidal sections of semicircular cross section.
Claim 10
Dependent Claim
21 words
An article as defined in claim 8 wherein said base possesses only a single such annular section of rectilinear cross section.
Claim 11
Dependent Claim
30 words
An article as defined in claim 8 wherein said annular section of rectilinear cross section is located between an upwardly concave and an upwardly convex section of semicircular cross section.
Claim 12
Dependent Claim
26 words
An article as defined in claim 8 wherein said annular section of rectilinear cross section is located between two upwardly concave sections of semicircular cross section.
Claim 13
Dependent Claim
26 words
An article as defined in claim 8 wherein said annular section of rectilinear cross section is located between two upwardly convex sections of semicircular cross section.
Claim 14
Dependent Claim
31 words
An article as defined in claim 8 wherein the width of said annular section of rectilinear cross section is between 2 and 10% of the maximum diameter of said side wall.
Claim 15
Dependent Claim
34 words
An article as defined in claim 8 wherein said annular section of rectilinear cross section is planar and is located in a plane which is perpendicular to the longitudinal axis of said hollow body.
Claim 16
Dependent Claim
23 words
An article as defined in claim 8 wherein said annular section of rectilinear cross section is in the form of a conic frustum.
Claim 17
Dependent Claim
21 words
An article as defined in claim 1 wherein the central portion of said base has a generally hemispherical, upwardly convex form.
References Cited (Backward Citations)
FR1119542A
Cited
US3403804A
Cited
US3498908A
Cited
US3870181A
Cited
US4024975A
Cited
US4134510A
Cited
US4108324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |