Patent US3498936A successfully refreshed from Google Patents.
US3498936A
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Hydroxyalkylated phenol-sulfur halide resins and polyurethanes containing same
Assignee: Hooker Chemical Corp
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Filing: 1967-11-27
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Granted: 1970-03-03
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Expires: 1987-11-27
Abstract
No abstract record available.
Inventors
- 👤 Bruce N Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:24
CPC Classifications
C; C07; C07C; C07C323/00; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/40; C08G18/48; C08G18/50; C08G18/5072; C08G18/64; C08G18/6453; C08G75/00; C08G75/02; C08L; C08L67/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1756817A
Cited
US2398253A
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US2629743A
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US3252922A
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GB919067A
Cited
US3129213A
Cited
US3164565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |