US3375210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing carbonate polymer foams
Assignee: Union Carbide Corp
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Filing: 1964-08-25
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Granted: 1968-03-26
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Onofrio Anthony A D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J2369/00; Y; Y10; Y10S; Y10S521/00; Y10S521/909
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |