Patent US2620044A successfully refreshed from Google Patents.
US2620044A
Expired / Lapsed
US
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Dust adhesive for gas filters
Assignee: Atlas Powder Co
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Filing: 1950-01-10
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Granted: 1952-12-02
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Expires: 1970-01-10
Abstract
No abstract record available.
Inventors
- 👤 Richard D Fine
- 👤 William L Trowbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:09
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2055; B01D39/02; B01D39/04; B01D39/2003; B01D39/2017; B01D39/202; B01D39/2024; B01D46/00; B01D2239/00; B01D2239/04; B01D2239/0457; B01D2239/0471; B01D2239/0492; B01D2239/06; B01D2239/0604; B01D2239/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A GAS FILTER OF THE STARTING TYPE HAVING A GAS-PERMEABLE MEDIUM CARRYING A SOLUTION OF AT LEAST ONE INORGANIC ACID FLAME RETARDING AGENT OF THE GROUP CONSISTING OF BORIC, PHOSPHORIC, AND SULFAMIC ACIDS IN A VISCOUS POLYOXYGENATED ORGANIC LIQUID COMPRISING A LIQUID POLYOXYGENATED ETHER OF A POLYHYDROXYLIC COMPOUND HAVING FROM 3 TO 12 CARBON ATOMS, SAID ETHER CONTAINING AT LEAST ONE OXYETHYLENE GROUP PER ORIGINAL HYDROXYL GROUP OF SAID POLYHYDROXYLIC COMPOUND.
Claim 2
Dependent Claim
71 words
A GAS FILTER OF THE STARTING TYPE HAVING A GAS-PERMEABLE MEDIUM CARRYING A SOLUTION OF AT LEAST ONE INORGANIC ACID FLAME RETARDING AGENT OF THE GROUP CONSISTING OF BORIC, PHOSPHORIC, AND SULFAMIC ACIDS IN A VISCOUS POLYOXYGENATED ORGANIC LIQUID COMPRISING A LIQUID POLYOXYGENATED ETHER OF A POLYHYDROXYLIC COMPOUND HAVING FROM 3 TO 12 CARBON ATOMS, SAID ETHER CONTAINING AT LEAST ONE OXYETHYLENE GROUP PER ORIGINAL HYDROXYL GROUP OF SAID POLYHYDROXYLIC COMPOUND.
References Cited (Backward Citations)
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US2138874A
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |