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Patent US3024494A successfully refreshed from Google Patents.
US3024494A
Expired / Lapsed
US
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Plastic pipe extrusion head
Assignee: HK Porter Co Inc
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Filing: 1958-07-21
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Granted: 1962-03-13
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Jerome S Szpila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/335; B29C48/336; B29C48/3366; B29C48/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US579938A
Cited
US1100002A
Cited
GB687937A
Cited
US2633602A
Cited
US2574555A
Cited
US2708772A
Cited
US2720680A
Cited
US2805446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |