US3456294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extrusion
Assignee: Ethylene Gulf Coast Corp
•
Filing: 1966-01-18
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Granted: 1969-07-22
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Expires: 1986-01-18
Abstract
No abstract record available.
Inventors
- 👤 William C Hood
- 👤 Forrest B Bruch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/022; B29C48/25; B29C48/30; B29C48/32; B29C48/36; B29C48/475; B29K; B29K2027/00; B29K2027/12; B29K2027/18
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |