Patent US3699202A successfully refreshed from Google Patents.
US3699202A
Expired / Lapsed
US
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Manufacture of pressed boards
Assignee: Individual
•
Filing: 1970-08-03
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Granted: 1972-10-17
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Expires: 1990-08-03
Abstract
Abstract Gaseous reactive or polymerizable compounds and a gaseous catalyst are incorporated into lignocellulosic particles or fibers, and the compounds are reacted or polymerized in the presence of the catalyst to form a binder during hot pressing of the particles or fibers to form a board.
Inventors
- 👤 Jean-Baptiste Verbestel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:22
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/18; B; B27; B27N; B27N1/00; B27N1/02; C; C08; C08L; C08L97/00; C08L97/02; C08L61/00; C08L61/04; C08L61/06; C08L91/00; C08L91/06; C08L91/08; Y; Y10; Y10S; Y10S264/00; Y10S264/51
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
The process of claim 1 wherein the binder constituents have a reactive group capable of a condensation reaction in the presence of the catalyst.
Claim 2
Dependent Claim
18 words
The process of claim 1 wherein the binder constituents are phenol and formaldehyde, and the catalyst is ammonia.
Claim 3
Dependent Claim
178 words
A process for manufacturing a board from particulate lignocellulosic material which comprises: a. suspending lignocellulosic material in a current of inert gas, the degree of fineness of the lignocellulosic material and the gas current speed being correlated to form a fluidized bed of the lignocellulosic material; b. incorporating a gaseous monomeric constituent of a resinous binder into the particulate lignocellulosic material by means of the current of inert gas; c. removing the particulate material from the fluidized bed of Step (b); d. incorporating a liquid monomeric constituent of a resinous binder into the particulate material of Step (c) by spraying; e. suspending the particulate material from Step (d) in a current of inert gas, the gas current speed being corRelated to form a fluidized bed of the said particulate material; f. incorporating a gaseous catalyst into the particulate material of Step (e); g. removing the particulate material from the fluidized bed of Step (f); and h. forming a binder of said materials incorporated into the particulate lignocellulosic material during hot pressing of the lignocellulosic material into a board.
Claim 4
Dependent Claim
24 words
The process of claim 4 wherein the binder constituents have a reactive group capable of a condensation reaction in the presence of the catalyst.
Claim 5
Dependent Claim
18 words
The process of claim 4 wherein the binder constituents are phenol and formaldehyde, and the catalyst is ammonia.
Claim 6
Dependent Claim
31 words
The process of claim 6 wherein the phenol is applied in the gaseous state, the formaldehyde is applied in a liquid state, and the ammonia is applied in a gaseous state.
References Cited (Backward Citations)
US3001228A
Cited
US3442999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |