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US3458490A
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US
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Polymerization
Assignee: Phillips Petroleum Co
•
Filing: 1964-12-31
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Granted: 1969-07-29
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Howard B Irvin
- 👤 James J Mathias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:13
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2931793A
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US3008938A
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US2963470A
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US3126365A
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US3072621A
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US3206287A
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US3193360A
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US3182050A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |