US3419509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury compounds as catalysts for the polyurethane reaction
Assignee: Wyandotte Chemicals Corp
•
Filing: 1965-11-22
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Granted: 1968-12-31
•
Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Willett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA720528A
Cited
US2692204A
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US3231597A
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GB909358A
Cited
GB997369A
Cited
US3201136A
Cited
US3136732A
Cited
GB970497A
Cited
US3291660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |