US3035943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing gas-filter mat
Assignee: Carl Freudenberg KG
•
Filing: 1959-08-26
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Granted: 1962-05-22
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Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Nottebohm Carl-Ludwig
- 👤 Schabert Robert
- 👤 Burk Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:47
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/68; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/163; B01D2239/00; B01D2239/10; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2139
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A METHOD OF PRODUCING A SELF-SUSTAINING HIGHLY POROUS REGENERABLE GAS-FILTER MAT, THE STEPS OF APPLYING RELATIVELY SMALL AMOUNTS OF A BONDING AGENT IN THE FORM OF A FOAM TO ONE SURFACE OF A BATT OF LOOSELY CARDABLE FIBERS ARRANGED IN RANDOM DIRECTIONS HAVING A BULK WEIGHT OF ABOUT 0.006, SUBSEQUENTLY DRYING THE THUS RESULTING PRESTABILIZED STRUCTURE AND THEN THROUGH-IMPREGNATING IT WITH A 8-60% SOLUTION OF:
Claim 2
Dependent Claim
66 words
IN A METHOD OF PRODUCING A SELF-SUSTAINING HIGHLY POROUS REGENERABLE GAS-FILTER MAT, THE STEPS OF APPLYING RELATIVELY SMALL AMOUNTS OF A BONDING AGENT IN THE FORM OF A FOAM TO ONE SURFACE OF A BATT OF LOOSELY CARDABLE FIBERS ARRANGED IN RANDOM DIRECTIONS HAVING A BULK WEIGHT OF ABOUT 0.006, SUBSEQUENTLY DRYING THE THUS RESULTING PRESTABILIZED STRUCTURE AND THEN THROUGH-IMPREGNATING IT WITH A 8-60% SOLUTION OF:
References Cited (Backward Citations)
US1945714A
Cited
US2106096A
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US2497117A
Cited
US2514145A
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US2719802A
Cited
US2607494A
Cited
US2879197A
Cited
US2888095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |