US2612966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene air filter
Assignee: Wingfoot Corp
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Filing: 1950-03-29
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Granted: 1952-10-07
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Expires: 1970-03-29
Abstract
No abstract record available.
Inventors
- 👤 William H Nicol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D46/10; B01D46/30; B01D46/52; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B01D2265/00; B01D2265/02; B01D2265/028; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29K2105/128; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A GAS FILTER FOR REMOVING SUSPENDED PARTICLES OF MATTER FROM A GAS, WHICH FILTER COMPRISES POLYETHYLENE ELEMENTS ARRANGED TO FORM A GAS PERVIOUS MAT OF SUFFICIENT THICKNESS TO PERMIT MULTIPLE CONTACT WITH THE POLYETHYLENE ELEMENTS OF THE PARTICLES OF MATTER CARRIED BY THE GAS.
Claim 2
Dependent Claim
44 words
A GAS FILTER FOR REMOVING SUSPENDED PARTICLES OF MATTER FROM A GAS, WHICH FILTER COMPRISES POLYETHYLENE ELEMENTS ARRANGED TO FORM A GAS PERVIOUS MAT OF SUFFICIENT THICKNESS TO PERMIT MULTIPLE CONTACT WITH THE POLYETHYLENE ELEMENTS OF THE PARTICLES OF MATTER CARRIED BY THE GAS.
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) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |