US3131084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray coating an air filter with nonyl phenoxy polyoxyethylene ethanol
Assignee: American Air Filter Co Inc
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Filing: 1961-01-19
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Granted: 1964-04-28
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Expires: 1981-01-19
Abstract
No abstract record available.
Inventors
- 👤 Robert J Boylan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:03
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; Y; Y10; Y10S; Y10S55/00; Y10S55/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
IN THE CONDITIONING OF FILTER MEDIA THE STEP OF SPRAY COATING THE MEDIA SURFACES WITH A DISPERSION CONSISTING OF NONYL PHENOXY POLYOXYETHYLENE ETHANOL HAVING FROM 9 TO 10 MOLES OF ETHYLENE OXIDE PER MOLE THEREOF.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |