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Patent US3499952A successfully refreshed from Google Patents.
US3499952A
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Pressure regulation in visbreaking extruder
Assignee: Phillips Petroleum Co
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Filing: 1967-01-19
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Granted: 1970-03-10
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Expires: 1987-01-19
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Kolner
- 👤 Edward J Kosinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:39
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/40; B29C48/435; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/922; B29C2948/92314; B29C2948/92323; B29C2948/92361; B29C2948/9238; B29C2948/92409; B29C2948/92504; B29C2948/92514; B29C2948/92561; B29C2948/9258; B29C2948/926; B29C2948/92695; B29C2948/92809; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C48/03
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |