US3311682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extrusion of tubular plastic film with external and internal spray cooling
Assignee: Gulf Oil Corp
•
Filing: 1963-10-21
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Granted: 1967-03-28
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Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 Ringley Edward
- 👤 Edward J Grazulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:16
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9115; B29C48/912; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2955311A
Cited
US2987767A
Cited
US3090998A
Cited
US3207823A
Cited
US3193547A
Cited
US3170011A
Cited
US3226459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |