Patent US3250834A successfully refreshed from Google Patents.
US3250834A
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Method for making foamable polystrene pellets
Assignee: Sun Chemical Corp
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Filing: 1962-07-19
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Granted: 1966-05-10
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Expires: 1982-07-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:16
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; B01; B01J; B01J2/00; B01J2/20; B29B; B29B9/00; B29B9/02; B29B9/06; B29C44/50; B29C48/00; B29C48/001; B29C48/0011; B29C48/0012; B29C48/0022; B29C48/022; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/345; B29C48/92; C; C08; C08J; C08J9/00; C08J9/16; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C48/04; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29K; B29K2025/00; B29K2025/04; B29K2025/06; B29K2101/00; B29K2101/12; B29K2105/00; B29K2105/04
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |