Patent US2579984A successfully refreshed from Google Patents.
US2579984A
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Filters for removing dust from gas or air
Assignee: Owens Corning
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Filing: 1948-10-23
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Granted: 1951-12-25
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Expires: 1968-10-23
Abstract
No abstract record available.
Inventors
- 👤 William L Trowbridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:55
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D39/16; B01D39/1607; B01D39/1615; B01D39/1623; B01D39/163; B01D46/00; C; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/18; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0492; B01D2239/08; B01D2239/086; Y; Y10; Y10S; Y10S55/00; Y10S55/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A GAS FILTER COMPRISING FIBERS BONDED AT LEAST AT THEIR JUNCTURES BY AN ELASTOMER AND CARRYING ON THE FIBER SURFACES A POLYOXYALKYLENE DERIVATIVE OF THE REACTION PRODUCT OF A DEHYDRATED HEXITOL AND A SATURATED FATTY ACID HAVING 10 TO 18 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
44 words
A GAS FILTER COMPRISING FIBERS BONDED AT LEAST AT THEIR JUNCTURES BY AN ELASTOMER AND CARRYING ON THE FIBER SURFACES A POLYOXYALKYLENE DERIVATIVE OF THE REACTION PRODUCT OF A DEHYDRATED HEXITOL AND A SATURATED FATTY ACID HAVING 10 TO 18 CARBON ATOMS PER MOLECULE.
References Cited (Backward Citations)
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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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |