US2620044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust adhesive for gas filters
Assignee: Atlas Powder Co
•
Filing: 1950-01-10
•
Granted: 1952-12-02
•
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 01:08
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)
US2178614A
Cited
US2137246A
Cited
US2138874A
Cited
US2252724A
Cited
US2220127A
Cited
US2443766A
Cited
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 |