Patent US6487663B1 successfully refreshed from Google Patents.
US3424701A
Expired / Lapsed
US
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Polyurethane compositions
Assignee: Hooker Chemical Corp
•
Filing: 1967-08-29
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Granted: 1969-01-28
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 Francis M Kujawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08G18/683; C08G18/686; C08G18/40; C08G18/54; C08G18/546; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6535; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2996474A
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US2779689A
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US3156659A
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US3075927A
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US3171819A
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GB919067A
Cited
US3137662A
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US3257337A
Cited
US3208959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |