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US3471604A
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US
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Preworking film
Assignee: Phillips Petroleum Co
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Filing: 1966-02-16
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Granted: 1969-10-07
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 Alvin E Butcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:55
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; B; B29; B29C; B29C59/00; B29C59/02; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3003304A
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US3038198A
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US3060515A
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US3137611A
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US3186886A
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US3199284A
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US3311692A
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US3242035A
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US3302501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |