Patent US4335821A successfully refreshed from Google Patents.
US4335821A
Expired / Lapsed
US
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Blow molded plastic material bottle bottom
Assignee: Graham Packaging Pet Technologies Inc
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Filing: 1980-11-04
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Granted: 1982-06-22
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Expires: 2000-11-04
Abstract
Abstract This disclosure relates to a minor change in the bottom configuration of a blow molded container and bottle formed of a plastic material which compensates for shrinkage in the bottom structure due to improper cooling whereby the improper cooling may be advantageously utilized to provide for a marked decrease in the blow molding cycle time.
Inventors
- 👤 Wayne N. Collette
- 👤 Suppayan M. Krishnakumar
- 👤 Gautam K. Mahajan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:33
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0223; B65D1/0261; B65D1/0284; B29; B29C; B29C49/00; B29C49/42; B29C49/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
A blow molded plastic material bottle bottom structure comprising a generally hemispherical outwardly convex bottom wall interrupted by a plurality of downwardly projecting wall portions defining hollow legs terminating in lower feet; said bottom wall having a lower polar portion of a smoothly continuous configuration and upwardly offset from and directly joined to said hemispherical configuration.
Claim 2
Dependent Claim
56 words
A blow molded plastic material bottle bottom structure comprising a generally hemispherical outwardly convex bottom wall interrupted by a plurality of downwardly projecting wall portions defining hollow legs terminating in lower feet; said bottom wall having a lower polar portion of a smoothly continuous configuration and upwardly offset from and directly joined to said hemispherical configuration.
Claim 3
Dependent Claim
12 words
The bottom structure of claim 1 wherein said polar portion is flat.
Claim 4
Dependent Claim
13 words
The bottom structure of claim 1 wherein said polar portion is upwardly convex.
References Cited (Backward Citations)
US3570057A
Cited
US3598270A
Cited
US3665063A
Cited
US3727783A
Cited
US3789093A
Cited
US4054017A
Cited
US3948404A
Cited
US3935955A
Cited
US4192843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |