US3531553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of injection molding olefin plastic articles with a foamed interior and unfoamed surface
Assignee: Phillips Petroleum Co
•
Filing: 1967-11-13
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Granted: 1970-09-29
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Roy L Bodkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:34
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/04; B29C44/0461; B29C45/00; Y; Y10; Y10S; Y10S264/00; Y10S264/14; Y10S264/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2996764A
Cited
US3086249A
Cited
US3218375A
Cited
US3211605A
Cited
US3268636A
Cited
US3378612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |