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US3472801A
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US
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Method of making particulate polymer foams
Assignee: Millennium Petrochemicals Inc
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Filing: 1967-02-10
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Granted: 1969-10-14
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Expires: 1987-02-10
Abstract
No abstract record available.
Inventors
- 👤 Frank Lerman
- 👤 Raymond C Bartsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:46
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J3/00; C08J3/12; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202481A
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US2284023A
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US2844486A
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US2943949A
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US3197423A
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US3321426A
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US3308211A
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US3371053A
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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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |