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US3523990A
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Method of molding expandable polystyrene pellets to form objects without surface protrusions
Assignee: Lanier Industries Inc
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Filing: 1968-02-13
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Granted: 1970-08-11
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Expires: 1988-02-13
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:18
CPC Classifications
C; C11; C11D; C11D13/00; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C33/00; B29C33/42; B29C44/3415; B29C44/3426; B29K; B29K2025/00; B29L; B29L2031/00; B29L2031/30; B29L2031/3076; B29L2031/3085; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479
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) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |