US2574784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic adhesive and method of bonding wood plies
Assignee: Weyerhaeuser Timber Co
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Filing: 1944-12-26
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Granted: 1951-11-13
•
Expires: 1964-12-26
Abstract
No abstract record available.
Inventors
- 👤 Clark C Heritage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:23
CPC Classifications
C; C09; C09J; C09J161/00; C09J161/04; C09J161/06; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
AN ADHESIVE COMPOSITION COMPRISING A PHENOL-ALDEHYDE RESIN WHEREIN THE ALDEHYDE IS SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE, AND AS AN ADHESIVE CONSTITUENT THE REACTION MASS RESULTING FROM CHEMICALLY REACTING COMMINUTED BARK, WATER AND ALKALI AT TEMPRATURES OF ABOUT 180* F., THE PROPORTION OF COMMINUTED BARK TO RESIN ON A DRY WEIGHT BASIS BEING WITHIN THE RANGE OF FROM 6 PARTS BARK TO 1 PART RESIN TO 2 PARTS BARK TO 6.5 PARTS RESIN.
Claim 2
Dependent Claim
76 words
AN ADHESIVE COMPOSITION COMPRISING A PHENOL-ALDEHYDE RESIN WHEREIN THE ALDEHYDE IS SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE, AND AS AN ADHESIVE CONSTITUENT THE REACTION MASS RESULTING FROM CHEMICALLY REACTING COMMINUTED BARK, WATER AND ALKALI AT TEMPRATURES OF ABOUT 180* F., THE PROPORTION OF COMMINUTED BARK TO RESIN ON A DRY WEIGHT BASIS BEING WITHIN THE RANGE OF FROM 6 PARTS BARK TO 1 PART RESIN TO 2 PARTS BARK TO 6.5 PARTS RESIN.
Claim 3
Independent Claim
82 words
A METHOD FOR THE MANUFACTURE OF PLYWOOD, WHICH COMPRISES PREPARING AN ADHESIVE COMPOSITION COMPRISING AN ADMIXTURE OF A PHENOL-ALDEHYDE RESIN, WHEREIN THE ALDEHYDE IS SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE, AND THE REACTION MASS RESULTING FROM REACTING WATER, AT LEAST ONE BASIC ACTING COMPOUND OF SODIUM, AND BARK POWDER, FORMING AN INTERFACE OF SAID COMPOSITION BETWEEN LAYERS OF WOOD VENEER TO BE UNITED, AND APPLYING HEAT AND PRESSURE TO THE SAID LAYERS AND INTERFACIAL COMPOSITION FOR SETTING THE ADHESIVE.
Claim 4
Independent Claim
82 words
A METHOD FOR THE MANUFACTURE OF PLYWOOD, WHICH COMPRISES PREPARING AN ADHESIVE COMPOSITION COMPRISING AN ADMIXTURE OF A PHENOL-ALDEHYDE RESIN, WHEREIN THE ALDEHYDE IS SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE, AND THE REACTION MASS RESULTING FROM REACTING WATER, AT LEAST ONE BASIC ACTING COMPOUND OF SODIUM, AND BARK POWDER, FORMING AN INTERFACE OF SAID COMPOSITION BETWEEN LAYERS OF WOOD VENEER TO BE UNITED, AND APPLYING HEAT AND PRESSURE TO THE SAID LAYERS AND INTERFACIAL COMPOSITION FOR SETTING THE ADHESIVE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |