Patent US3306765A successfully refreshed from Google Patents.
US3306765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fireproofing wood and the treated wood
Assignee: General Dynamics Corp
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Filing: 1963-09-03
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Granted: 1967-02-28
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Fresne Eugene R Du
- 👤 Donald L Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:32
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/02; B; B27; B27K; B27K2240/00; B27K2240/30; B27K3/00; B27K3/16; B27K3/163; B27K3/32; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
A FIRE-RESISTANT WOOD COMPRISING WOOD HAVING DISPERSED THEREIN THE REACTION PRODUCT OF CARBON DIOXIDE AND A SOLUTION CONTAINING A SOLUBLE CRYSTALLINE SILICATE AND A SOLUBLE BORATE.
Claim 2
Dependent Claim
26 words
A FIRE-RESISTANT WOOD COMPRISING WOOD HAVING DISPERSED THEREIN THE REACTION PRODUCT OF CARBON DIOXIDE AND A SOLUTION CONTAINING A SOLUBLE CRYSTALLINE SILICATE AND A SOLUBLE BORATE.
Claim 3
Independent Claim
59 words
A METHOD OF FIREPROOFING WOOD COMPRISING IMPREGNATING THE WOOD WITH A SOLUTION CONTAINING A SOLUBLE CRYSTALLINE SILICATE AND A SOLUBLE BORATE IN A RATIO OF ABOUT ONE-QUARTER TO ONE-HALF MOLE BORATE PER MOLE OF SILICATE AND TREATING THE IMPREGNATED WOOD WITH SUFFICIENT CARBON DIOXIDE UNDER SUPER-ATMOSPHERIC PRESSURE TO FORM A SILICON DIOXIDE POLYMER THEREIN THAT IS INSOLUBLE AND NONCOMBUSTIBLE.
Claim 4
Independent Claim
59 words
A METHOD OF FIREPROOFING WOOD COMPRISING IMPREGNATING THE WOOD WITH A SOLUTION CONTAINING A SOLUBLE CRYSTALLINE SILICATE AND A SOLUBLE BORATE IN A RATIO OF ABOUT ONE-QUARTER TO ONE-HALF MOLE BORATE PER MOLE OF SILICATE AND TREATING THE IMPREGNATED WOOD WITH SUFFICIENT CARBON DIOXIDE UNDER SUPER-ATMOSPHERIC PRESSURE TO FORM A SILICON DIOXIDE POLYMER THEREIN THAT IS INSOLUBLE AND NONCOMBUSTIBLE.
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |