US3519579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making polyurethane foams with polysiloxanes having reactive - nco and - ncs groups
Assignee: Union Carbide Corp
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Filing: 1969-03-10
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Granted: 1970-07-07
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Expires: 1989-03-10
Abstract
No abstract record available.
Inventors
- 👤 Bernard Kanner
- 👤 Enrico James Pepe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/778; C08J2375/00; C08J2375/04; C08J2375/08; C08J2483/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3182076A
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US3178391A
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US3243475A
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US3272762A
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US3179622A
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US3278465A
Cited
US3170891A
Cited
US3246048A
Cited
US3249586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |