US3535199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant wood-chip panels containing fully hardened urea formaldehyde as flame retardant
Assignee: Occidental Chemical Corp
•
Filing: 1967-09-21
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Granted: 1970-10-20
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Expires: 1987-09-21
Abstract
No abstract record available.
Inventors
- 👤 Johann Kuhr
- 👤 Heinz Weinbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:59
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA569891A
Cited
US2509642A
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US2488034A
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US2452054A
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US2518963A
Cited
US2690100A
Cited
US2684953A
Cited
US3138565A
Cited
US3352744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |