Patent US4108226A successfully refreshed from Google Patents.
US4108226A
Expired / Lapsed
US
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Veneer production
Assignee: GP Chemicals Equity LLC
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Filing: 1977-01-03
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Granted: 1978-08-22
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Expires: 1997-01-03
Abstract
Abstract Veneer production from softwood logs is improved by adding at least about 0.003% of urea to the hot water soaking vats prior to peeling the veneer from the logs. Enhanced results are achieved when urea is added together with a base such as sodium hydroxide.
Inventors
- 👤 L. F. Bornstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:35
CPC Classifications
B; B27; B27L; B27L5/00; B27K; B27K3/00; B27K3/16; B27K3/20; B27K3/34; B27K3/36; B27K3/52; B27K5/00; B27K5/06; Y; Y10; Y10S; Y10S162/00; Y10S162/03; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1061; Y10T428/00; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
55 words
A method for the production of softwood veneer comprising the steps of: (a) soaking softwood logs in a vat containing hot water and a conditioning agent comprising urea; said urea being present in said vat in a concentration of from about 0.003% to about 2% by weight; and (b) peeling a veneer from said logs.
Claim 2
Independent Claim
55 words
A method for the production of softwood veneer comprising the steps of: (a) soaking softwood logs in a vat containing hot water and a conditioning agent comprising urea; said urea being present in said vat in a concentration of from about 0.003% to about 2% by weight; and (b) peeling a veneer from said logs.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said urea is present in said vat in a concentration of from about 0.003% to about 0.1% by weight.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said soaking is carried out at a vat water temperature of from about 40° to about 80° C.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said soaking is carried out for a period of from about 10 to about 15 hours.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said conditioning agent additionally contains a base.
Claim 7
Dependent Claim
11 words
The method of claim 5 wherein said base is sodium hydroxide.
Claim 8
Dependent Claim
30 words
The method of claim 5 wherein said base is added in an amount sufficient to keep the vat water pH from about 6 to about 8 during said soaking step.
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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) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |