US3505253A
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Expandable alkenyl aromatic polymers containing incorporated expandable alkenyl aromatic polymers and polysiloxane
Assignee: HUGH C CRALL
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Filing: 1969-03-12
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Granted: 1970-04-07
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Expires: 1989-03-12
Abstract
No abstract record available.
Inventors
- 👤 Arnold B Finestone
- 👤 Michal Niechwiadowicz
- 👤 Hugh C Crall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0019; C08F; C08F257/00; C08F257/02; C08F279/00; C08F279/02; C08F283/00; C08F283/12; C08J9/16; C08J9/20; C08J2325/00; C08J2325/02
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) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |