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US3526929A
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Apparatus for minimizing terminal drool in intermittent-charge plastic extrusion apparatus
Assignee: Shell USA Inc
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Filing: 1967-11-24
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Granted: 1970-09-08
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Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Frank E Coupland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:41
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/38; B29C45/00; B29C45/17; B29C45/46; B29C45/53; B29C45/54; B29C48/388; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/926; B29C2948/92809; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29C2948/92961; B29C48/03; B29C48/09; B29C49/00; B29C49/02; B29C49/04; B29C49/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2887716A
Cited
US3054143A
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US3089192A
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US3127637A
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US3217360A
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US3259944A
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FR1476753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |