Patent US3510548A successfully refreshed from Google Patents.
US3510548A
Expired / Lapsed
US
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Process for blow molding foam parisons formed from expandable polystyrene beads
Assignee: Day Cecil H R
•
Filing: 1967-11-16
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Granted: 1970-05-05
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Expires: 1987-11-16
Abstract
No abstract record available.
Inventors
- 👤 Peter D J Dicks
- 👤 William M Hill
- 👤 James T Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:14
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0005; B29C49/02; B29C49/06; B29C2049/023; B29K; B29K2105/00; B29K2105/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2469130A
Cited
US3002225A
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US3144493A
Cited
US3225127A
Cited
US3013304A
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US3264381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |