Patent US3770577A successfully refreshed from Google Patents.
US3770577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant paper and paper board
Assignee: AMAX SPECIALTY METALS Corp A CORP OF DE
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Filing: 1969-09-23
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Granted: 1973-11-06
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Expires: 1989-09-23
Abstract
Abstract A flame and after-glow retardant composition is prepared and incorporated into paper products. The composition is a dry, powdered material consisting essentially of about 2-75 weight percent zinc borate or barium borate, 2-75 weight percent antimony oxide having a maximum particle size of 100 mesh, and 15-85 percent of a solid, suitable organic halide source.
Inventors
- 👤 S Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:54
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; D21H17/00; D21H17/71; D21H17/73; D21H19/00; D21H19/36; D21H19/44; D21H19/64; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
A paper product in which is incorporated about 5 to 50 weight percent based on the weight of the pulp of the flame retardant composition of claim 1.
Claim 2
Dependent Claim
34 words
The paper product of claim 2 wherein said product is paperboard and the amount of flame retardant composition added to the paper is about 5 weight percent based on the weight of the pulp.
Claim 3
Dependent Claim
28 words
The paper product of claim 2 wherein the product is paper and the flame retardant is added in an amount of about 5 weight percent of the pulp.
Claim 4
Dependent Claim
31 words
The paper product of claim 2 wherein the product is paper and the flame retardant is added in an amount of about 10-30 percent based on the weight of the pulp.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |