US2643957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preserving wood
Assignee: Individual
•
Filing: 1951-08-07
•
Granted: 1953-06-30
•
Expires: 1971-08-07
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Lindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/52; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/945
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS OF PRESERVING WOOD COMPRISING CULTURING TRICHODERMA VIRIDE ON GREEN WOOD WHICH HAS HAD AN INORGANIC FLUORIDE APPLIED TO THE SURFACE THEREOF, WHEREBY THE PERMEABILITY OF THE WOOD IS INCREASED, AND IMPREGNATING THE RESULTING WOOD WITH A LIQUID WOOD PRESERVATIVE.
Claim 2
Dependent Claim
41 words
A PROCESS OF PRESERVING WOOD COMPRISING CULTURING TRICHODERMA VIRIDE ON GREEN WOOD WHICH HAS HAD AN INORGANIC FLUORIDE APPLIED TO THE SURFACE THEREOF, WHEREBY THE PERMEABILITY OF THE WOOD IS INCREASED, AND IMPREGNATING THE RESULTING WOOD WITH A LIQUID WOOD PRESERVATIVE.
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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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |