Patent US3444283A successfully refreshed from Google Patents.
US3444283A
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Method for direct injection extrusion of polystyrene foam
Assignee: Mobil Oil AS
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Filing: 1965-11-08
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Granted: 1969-05-13
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Expires: 1985-11-08
Abstract
No abstract record available.
Inventors
- 👤 Frank A Carlson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; B; B29; B29C; B29C44/00; B29C44/34; B29C44/3442; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/04; C08K5/09; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2941965A
Cited
US2911382A
Cited
GB854586A
Cited
US3089857A
Cited
US3069367A
Cited
US3160688A
Cited
US3151192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |