US3404198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol-formaldehyde-urea resin and method of preparation
Assignee: Ashland LLC
•
Filing: 1965-07-30
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Granted: 1968-10-01
•
Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Guyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:34
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/34; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G14/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1717600A
Cited
DE557549C
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US2175793A
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US2205427A
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US2174132A
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US2228837A
Cited
US2315400A
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US2500054A
Cited
FR998444A
Cited
US3306864A
Cited
US3215585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |