Patent US3506599A successfully refreshed from Google Patents.
US3506599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foaming acid-curable plastics
Assignee: Hexion Inc
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Filing: 1963-07-24
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Granted: 1970-04-14
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Expires: 1983-07-24
Abstract
No abstract record available.
Inventors
- 👤 Robert B Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:47
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J2361/00
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) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |