Patent US3428609A successfully refreshed from Google Patents.
US3428609A
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Polyurethane coating compositions and process of making same
Assignee: Imperial Chemical Industries Ltd
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Filing: 1966-03-14
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Granted: 1969-02-18
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth William Chilvers
- 👤 Gordon Trappe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10S528/906; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31558; Y10T428/31569; Y10T428/31573; Y10T428/3158; Y10T428/31591; Y10T428/31598; Y10T428/31601; Y10T428/31605
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |