US3493526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproof structural foamed phenol-benzaldehyde resin cured with methylated diphenyl oxide
Assignee: Dow Chemical Co
•
Filing: 1967-04-10
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Granted: 1970-02-03
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Expires: 1987-04-10
Abstract
No abstract record available.
Inventors
- 👤 Harry A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0225; C08J9/12; C08J9/14; C08J2361/00; Y; Y10; Y10S; Y10S521/00; Y10S521/907; Y10S521/911; Y10S521/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2797201A
Cited
US2959508A
Cited
US2806509A
Cited
US3316140A
Cited
US3298973A
Cited
US3317473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |