US2769729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fireproofing porous materials
Assignee: Individual
•
Filing: 1954-12-03
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Granted: 1956-11-06
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Expires: 1974-12-03
Abstract
No abstract record available.
Inventors
- 👤 Lodewijk J C Van De Zande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:05
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56; D06M11/57; D06M11/68; D06M11/70; D06M11/71; D06M11/80; D06M11/82; D06M13/00; D06M13/10; D06M13/144; D06M13/148; D21H17/00; D21H17/71; D21H17/74; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR FIREPROOFING FABRICS, PAPER, AND POROUS MATERIAL IN GENERAL, WHICH COMPRISES IMPREGNATING THE MATERIAL TO BE FIRE-PROOFED WITH A SOLUTION OF AMMONIUM SULFATE, AMMONIUM PHOSPHATE, BORIC ACID, SODIUM TETRABORATE, 1 TO 5% BY WEIGHT OF GLYCERINE, AND 1 TO 5% BY WEIGHT OF TURKEY RED OIL.
Claim 2
Dependent Claim
48 words
A PROCESS FOR FIREPROOFING FABRICS, PAPER, AND POROUS MATERIAL IN GENERAL, WHICH COMPRISES IMPREGNATING THE MATERIAL TO BE FIRE-PROOFED WITH A SOLUTION OF AMMONIUM SULFATE, AMMONIUM PHOSPHATE, BORIC ACID, SODIUM TETRABORATE, 1 TO 5% BY WEIGHT OF GLYCERINE, AND 1 TO 5% BY WEIGHT OF TURKEY RED OIL.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |