US3490240A
Expired / Lapsed
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Assignee: Phillips Petroleum Co
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Filing: 1967-11-16
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Granted: 1970-01-20
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Expires: 1987-11-16
Abstract
No abstract record available.
Inventors
- 👤 William M Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:33
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/02; F17C13/028; G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0335; F17C2205/0338; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0135; F17C2250/00; F17C2250/03; F17C2250/036; F17C2250/04; F17C2250/0404; F17C2250/0443; F17C2250/06; F17C2250/0605; F17C2250/0636; F17C2250/07; F17C2250/072; F17C2260/00; F17C2260/03; F17C2260/035; F17C2260/037; F17C2260/038; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0155; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7287; Y10T137/8593
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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |