Patent US4445623A successfully refreshed from Google Patents.
US4445623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded trash container cover
Assignee: WASTAINER SYSTEMS Inc
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Filing: 1982-09-30
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Granted: 1984-05-01
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Expires: 2002-09-30
Abstract
Abstract A rotationally molded, one-piece plastic trash container cover having peripheral flanges, stiffening ribs and cylindrical bosses defining reinforced hinges, in which the plastic is high density, cross-linked polyethylene.
Inventors
- 👤 Byron M. Kolling
- 👤 Jack Bergbreiter
- 👤 Roy Hunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:45
CPC Classifications
B; B65; B65F; B65F1/00; B65F1/14; B65F1/16; B29; B29C; B29C41/00; B29C41/02; B29C41/04; Y; Y10; Y10S; Y10S220/00; Y10S220/908
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A container cover comprising a one-piece body formed of plastic and shaped to have peripheral side flanges to stiffen the outer shape of the cover, said cover also having a plurality of rigs spaced across the body to stiffen the cover into a substantially planar configuration, and said cover having a pair of cylindrical aligned bosses in two of said flanges near one edge of said body adapted to receive a hinge rod and thus serve as reinforced hinges for the cover.
Claim 2
Dependent Claim
82 words
A container cover comprising a one-piece body formed of plastic and shaped to have peripheral side flanges to stiffen the outer shape of the cover, said cover also having a plurality of rigs spaced across the body to stiffen the cover into a substantially planar configuration, and said cover having a pair of cylindrical aligned bosses in two of said flanges near one edge of said body adapted to receive a hinge rod and thus serve as reinforced hinges for the cover.
Claim 3
Dependent Claim
31 words
The cover of claim 1 in which the body has been rotationally molded and, except for said bosses, is a sheet of substantially uniform thickness molded into said flanges and ribs.
Claim 4
Dependent Claim
15 words
The cover of claim 2 in which the plastic is a high density cross-linked polyethylene.
References Cited (Backward Citations)
US4342402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |