US3232811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of bonding lumber by parallel high frequency heating
Assignee: Potlatch Forests Inc
•
Filing: 1960-09-26
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Granted: 1966-02-01
•
Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Coulter Bert
- 👤 Julius W Mann
- 👤 Herbert B Mckean
- 👤 George F Russell
- 👤 John W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
B; B27; B27D; B27D1/00; B27D1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE PROCESS OF BONDING A PLURALITY OF BOARDS TOGETHER BY MEANS OF A THERMO-SETTING ALKALINE CATALYZED PHENOL FORMALDEHYDE ADHESIVE LAYER APPLIED BETWEN THE BOARDS PRIOR TO BONDING, THE BOARDS HAVING SMOOTH FINISHED SURFACES AND A MAXIMUM MOISTURE CONTENT OF 12 PERCENT, WHICH COMPRISES POSITIONING THE BOARDS BETWEEN OPPOSED ELECTRODES POSITIONED PERPENDICULARLY RELATIVE TO THE PROPOSED GLUE LINES, THE ADHESIVE BEING SO APPLIED BETWEEN THE BOARDS AS TO PROVIDE AIR GAPS ALONG UNCOATED BOARD SURFACES BETWEEN EACH ELECTRODES AND THE ADACENT EDGE OF EACH ADHESIVE LAYER, SUBJECTING THE BOARDS TO PRESSURE IN A DIRECTION PERPENDICULAR TO THE GLUE LINE AND APPLYING HIGH FREQUENCY ELECTRIC POTENTIAL ACROSS THE BOARDS SUFFICIENT TO HEAT THE ADHESIVE TO CURING TEMPERATURE, SAID POTENTIAL BEING MAINTAINED FOR A DURATION OF TIME SUFFICIENT TO EFFECT CURING OF THE ADHESIVE.
Claim 2
Dependent Claim
131 words
THE PROCESS OF BONDING A PLURALITY OF BOARDS TOGETHER BY MEANS OF A THERMO-SETTING ALKALINE CATALYZED PHENOL FORMALDEHYDE ADHESIVE LAYER APPLIED BETWEN THE BOARDS PRIOR TO BONDING, THE BOARDS HAVING SMOOTH FINISHED SURFACES AND A MAXIMUM MOISTURE CONTENT OF 12 PERCENT, WHICH COMPRISES POSITIONING THE BOARDS BETWEEN OPPOSED ELECTRODES POSITIONED PERPENDICULARLY RELATIVE TO THE PROPOSED GLUE LINES, THE ADHESIVE BEING SO APPLIED BETWEEN THE BOARDS AS TO PROVIDE AIR GAPS ALONG UNCOATED BOARD SURFACES BETWEEN EACH ELECTRODES AND THE ADACENT EDGE OF EACH ADHESIVE LAYER, SUBJECTING THE BOARDS TO PRESSURE IN A DIRECTION PERPENDICULAR TO THE GLUE LINE AND APPLYING HIGH FREQUENCY ELECTRIC POTENTIAL ACROSS THE BOARDS SUFFICIENT TO HEAT THE ADHESIVE TO CURING TEMPERATURE, SAID POTENTIAL BEING MAINTAINED FOR A DURATION OF TIME SUFFICIENT TO EFFECT CURING OF THE ADHESIVE.
References Cited (Backward Citations)
US2434573A
Cited
US2437981A
Cited
US2457498A
Cited
US2571604A
Cited
US2591771A
Cited
US3016316A
Cited
US3038511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |