US3453132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the durability of wood surfaces
Assignee: Weyerhaeuser Co
•
Filing: 1965-09-29
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Granted: 1969-07-01
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Expires: 1985-09-29
Abstract
No abstract record available.
Inventors
- 👤 Albert Ernest Frankland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/16; B05D2203/00; B05D2203/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |