US3530536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding variable thickness materials
Assignee: Phillips Petroleum Co
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Filing: 1967-11-15
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Granted: 1970-09-29
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Expires: 1987-11-15
Abstract
No abstract record available.
Inventors
- 👤 Baxter L Thorman
- 👤 Fred J Zavasnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:40
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/325; B29C48/03; B29C48/09; B29C48/13; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92085; B29C2948/92104; B29C2948/92114; B29C2948/92152; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29C2948/92923; B29C2948/92952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |