US2811470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized wood and a method for its production
Assignee: Dow Chemical Co
•
Filing: 1956-05-31
•
Granted: 1957-10-29
•
Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Duane L Kenaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:22
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/34; B27K3/50; B27K3/02; B27K3/0278; B27K3/38; B27K5/00; B27K5/001; C; C08; C08L; C08L97/00; C08L97/02; B27K2200/00; B27K2200/10; B27K3/15; C08L61/00; C08L61/02; Y; Y10; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR THE DIMENSIONAL STABILIZATION OF LIGNOCELLULOSIC MATERIALS WHICH COMPRISES (A) IMPREGNATING THE LIGNOCELLULOSIC MATERIAL WITH A PHTHALADEHYDIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHTHALALDEHYDIC ACID AND PHTHALALDEHYDIC ACID SUBSTITUTED IN THE ARYL PORTION OF THE ACID MOLECULE WITH AT LEAST ONE OF THE GROUP CONSISTING OF CHLORINE AND LOWER ALKYL RADICALS, (B) SWELLING THE LIGNOCELLULOSIC MATERIAL WITH A LIQUID SWELLING AGENT AND (C) CURING THE IMPREGNATED MATERIAL BY HEATING WHILE IN THE SWOLLEN CONDITION TO THE REACTION TEMPERATURE OF SAID PHTHALALDEHYDIC ACID COMPOUND WITH THE LIGNOCELLULOSIC STRUCTURE, WHEREIN THE IMPREGNATION IS EFFECTED AT LEAST AS SOON AS THE SWELLING STEP.
Claim 2
Dependent Claim
104 words
A PROCESS FOR THE DIMENSIONAL STABILIZATION OF LIGNOCELLULOSIC MATERIALS WHICH COMPRISES (A) IMPREGNATING THE LIGNOCELLULOSIC MATERIAL WITH A PHTHALADEHYDIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHTHALALDEHYDIC ACID AND PHTHALALDEHYDIC ACID SUBSTITUTED IN THE ARYL PORTION OF THE ACID MOLECULE WITH AT LEAST ONE OF THE GROUP CONSISTING OF CHLORINE AND LOWER ALKYL RADICALS, (B) SWELLING THE LIGNOCELLULOSIC MATERIAL WITH A LIQUID SWELLING AGENT AND (C) CURING THE IMPREGNATED MATERIAL BY HEATING WHILE IN THE SWOLLEN CONDITION TO THE REACTION TEMPERATURE OF SAID PHTHALALDEHYDIC ACID COMPOUND WITH THE LIGNOCELLULOSIC STRUCTURE, WHEREIN THE IMPREGNATION IS EFFECTED AT LEAST AS SOON AS THE SWELLING STEP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |