US3843526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel intumescent composition containing an aromatic amine sulfate
Assignee: Cities Service Co
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Filing: 1972-04-28
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Granted: 1974-10-22
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Expires: 1992-04-28
Abstract
Abstract 1. AN INTUMESCENT COMPOSITION COMPRISING AS THE INTUMESCENT AGENT A MIXTURE OF (A) ONE MOLAR PROPORTION OF A SULFATE OF AN AROMATIC AMINE OF THE GROUP CON SISTING OF P-NITROANILINE, O-NITROANILINE, M-NITROANILINE, 3AMINO-1-NITRONAPTHALENE, 4-AMINO-4''-NITRO-BPHENYL, 1,5DIAMINO 4,8-DINITRONAPTHALENE, 2-AMINO-7-NITROFLUORENE, 4-AMINO-2-NITROFURAN, 5-NITROISATOIC ANHYDRIDE, AND 4NITROACETANILIDE AND (B) ABOUT 1-5 MOLAR PROPORTIONS OF A BORON COMPOUND OF THE GROUP CONSISTING OF BORIC ACID, AN ORGANOBORIC ACID, AN ORGANOBORATE, AND AN ORGANOBOROXINE.
Inventors
- 👤 S Roth
- 👤 J Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08K3/00; C08K3/38; C08K5/55; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AN INTUMESCENT COMPOSITION COMPRISING AS THE INTUMESCENT AGENT A MIXTURE OF (A) ONE MOLAR PROPORTION OF A SULFATE OF AN AROMATIC AMINE OF THE GROUP CON SISTING OF P-NITROANILINE, O-NITROANILINE, M-NITROANILINE, 3AMINO-1-NITRONAPTHALENE, 4-AMINO-4''-NITRO-BPHENYL, 1,5DIAMINO 4,8-DINITRONAPTHALENE, 2-AMINO-7-NITROFLUORENE, 4-AMINO-2-NITROFURAN, 5-NITROISATOIC ANHYDRIDE, AND 4NITROACETANILIDE AND (B) ABOUT 1-5 MOLAR PROPORTIONS OF A BORON COMPOUND OF THE GROUP CONSISTING OF BORIC ACID, AN ORGANOBORIC ACID, AN ORGANOBORATE, AND AN ORGANOBOROXINE.
Claim 2
Dependent Claim
66 words
AN INTUMESCENT COMPOSITION COMPRISING AS THE INTUMESCENT AGENT A MIXTURE OF (A) ONE MOLAR PROPORTION OF A SULFATE OF AN AROMATIC AMINE OF THE GROUP CON SISTING OF P-NITROANILINE, O-NITROANILINE, M-NITROANILINE, 3AMINO-1-NITRONAPTHALENE, 4-AMINO-4''-NITRO-BPHENYL, 1,5DIAMINO 4,8-DINITRONAPTHALENE, 2-AMINO-7-NITROFLUORENE, 4-AMINO-2-NITROFURAN, 5-NITROISATOIC ANHYDRIDE, AND 4NITROACETANILIDE AND (B) ABOUT 1-5 MOLAR PROPORTIONS OF A BORON COMPOUND OF THE GROUP CONSISTING OF BORIC ACID, AN ORGANOBORIC ACID, AN ORGANOBORATE, AND AN ORGANOBOROXINE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |