Patent US2547671A successfully refreshed from Google Patents.
US2547671A
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Fire-resistant article, method of making, and impregnant therefor
Assignee: Philadelphia Textile Finishers Inc
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Filing: 1945-10-13
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Granted: 1951-04-03
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Expires: 1965-10-13
Abstract
No abstract record available.
Inventors
- 👤 Morris J Sostmann
- 👤 Irwin L Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:50
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/47; D06M13/00; D06M13/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A COMPOSITION FOR RENDERING COMBUSTIBLE MATERIALS FIRE-RESISTANT, SAID COMPOSITION BEING THE PRODUCT OBTAINED BY REFLUXING ONE PART BY WEIGHT OF ANTIMONY TRIOXIDE WITH TWO PARTS BY WEIGHT OF ACETIC ANHYDRIDE UNTIL THE OXIDE IS COMPLETELY DISSOLVED.
Claim 2
Dependent Claim
36 words
A COMPOSITION FOR RENDERING COMBUSTIBLE MATERIALS FIRE-RESISTANT, SAID COMPOSITION BEING THE PRODUCT OBTAINED BY REFLUXING ONE PART BY WEIGHT OF ANTIMONY TRIOXIDE WITH TWO PARTS BY WEIGHT OF ACETIC ANHYDRIDE UNTIL THE OXIDE IS COMPLETELY DISSOLVED.
References Cited (Backward Citations)
DE222621C
Cited
GB190208509A
Cited
US1451313A
Cited
US1867658A
Cited
FR846522A
Cited
US2281784A
Cited
US2299612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |