US3674596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of laminating untreated wood to wood treated with fire retardant material
Assignee: Potlatch Forests Inc
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Filing: 1970-03-23
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Granted: 1972-07-04
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Expires: 1990-03-23
Abstract
Abstract A METHOD OF LAMINATING LUMBER WHEREIN AN OUTER LAYER IN THE LAMINATED ASSEMBLY IS TREATED WITH A FIRE RETARDANT SALT SOLUTION. THE LAMINATING PROCESS INVOLVES PRE-HEATING OF THE SURFACES TO BE BONDED, THE APPLICATION OF A THERMOSETTING ADHESIVE TO THE UNTREATED SURFACE, AND IMMEDIATE APPLICATION OF PRESSURE TO HOLD THE SURFACES IN INTIMATE CONTACT DURING SUBSTANTIAL CURING OF THE ADHESIVE. THE RESULTING PRODUCT HAS PARTICULAR STRUCTURAL AND PRACTICAL FEATURES WHICH ARE ATTRIBUTED TO THE METHOD.
Inventors
- 👤 Lawrence O Mcminimy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:10
CPC Classifications
B; B27; B27D; B27D1/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |