US3019127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering medium and method of making the same
Assignee: American Air Filter Co Inc
•
Filing: 1957-10-07
•
Granted: 1962-01-30
•
Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Lawrence J Czerwonka
- 👤 Robert F Logsdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
B; B01; B01D; B01D39/00; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/382; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD OF MAKING A FLUID TREATING FILTERING MEDIUM COMPRISING THE STEPS OF PASSING A FIBROUS PAD OF FILTER MATERIAL INTO A SPRAYING ZONE, SPRAYING SAID PAD OF FILTER AMOUNT OF LIQUID ADHESIVE SUFFICIENT TO INSURE SAID PAD IS THROUGHLY TREATED WITH SAID ADHESIVE, REMOVING SAID PAD FROM SAID SPRAYING ZONE AND EXPOSING SAID PAD TO THE ATMOSPHERE FOR A PERIOD OF TIME SUFFICIENT TO DEVELOP MAXIMUM TACKINESS OF SAID ADHESIVE, PASSING SAID PAD TO A PARTICLE IMPREGNATING ZONE, IMPREGNATING SAID PAD WITH ACTIVATED FLUID TREATING PARTICLES, VIBRATION SAID PAD TO INSURE DISTRIBUTION OF SAID PARTICLES IN SAID PAD, PASSING SAID PAD TO A HEATING ZONE, AND CURING SAID PAD IN SAID HEATING ZONE AT TEMPERATURES SUFFICIENT TO REACTIVATE ANY OF SAID FLUID TREATING PARTICLES WHICH MIGHT HAVE BEEN DEACTIVATED BUT BELOW THE DECOMPOSITION TEMPERATURE OF SAID ADHESIVE.
Claim 2
Independent Claim
138 words
A METHOD OF MAKING A FLUID TREATING FILTERING MEDIUM COMPRISING THE STEPS OF PASSING A FIBROUS PAD OF FILTER MATERIAL INTO A SPRAYING ZONE, SPRAYING SAID PAD OF FILTER AMOUNT OF LIQUID ADHESIVE SUFFICIENT TO INSURE SAID PAD IS THROUGHLY TREATED WITH SAID ADHESIVE, REMOVING SAID PAD FROM SAID SPRAYING ZONE AND EXPOSING SAID PAD TO THE ATMOSPHERE FOR A PERIOD OF TIME SUFFICIENT TO DEVELOP MAXIMUM TACKINESS OF SAID ADHESIVE, PASSING SAID PAD TO A PARTICLE IMPREGNATING ZONE, IMPREGNATING SAID PAD WITH ACTIVATED FLUID TREATING PARTICLES, VIBRATION SAID PAD TO INSURE DISTRIBUTION OF SAID PARTICLES IN SAID PAD, PASSING SAID PAD TO A HEATING ZONE, AND CURING SAID PAD IN SAID HEATING ZONE AT TEMPERATURES SUFFICIENT TO REACTIVATE ANY OF SAID FLUID TREATING PARTICLES WHICH MIGHT HAVE BEEN DEACTIVATED BUT BELOW THE DECOMPOSITION TEMPERATURE OF SAID ADHESIVE.
References Cited (Backward Citations)
US1055800A
Cited
US1395833A
Cited
US2416695A
Cited
US2267918A
Cited
US2539768A
Cited
US2746608A
Cited
US2798531A
Cited
US2774680A
Cited
US2940456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |