US2893105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of felt-like products from synthetic filaments
Assignee: EIDP Inc
•
Filing: 1954-06-11
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Granted: 1959-07-07
•
Expires: 1974-06-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Lauterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:21
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/498; D04H1/04; D04H1/06; D04H1/42; D04H1/425; D04H1/4258; D04H1/4282; D04H1/43; D04H1/4326; D04H1/4334; D04H1/435; D04H1/48; D04H1/482; D04H1/70; D04H1/74; D04H3/00; D04H3/005; D04H3/009; D04H3/011; D04H3/013; D04H3/08; D04H3/10; D04H3/105; D21; D21F; D21F7/00; D21F7/08; D21F7/083; Y; Y10; Y10S; Y10S128/00; Y10S128/14; Y10S128/18; Y10S55/00; Y10S55/05; Y10S8/00; Y10S8/10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T442/00; Y10T442/50; Y10T442/51; Y10T442/56; Y10T442/60; Y10T442/682; Y10T442/684; Y10T442/686
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
PROCESS FOR MAKING A FELT-LIKE LAMINAR NON-WOVEN PRODUCT COMPRISING FORMING A BATT OF FILAMENTS INCLUDING BOTH HEAT-RETRACTABLE POLYTETRAFLUOROETHYLENE FILAMENTS AND FILAMENTS CHARACTERIZED BY DECOMPOSITION INTO VOLATILE SUBSTANCES UPON HEATING TO A TEMPERATURE BELOW 327* C., FORCEABLY ORIENTING SOME OF THE POLYTETDRAFLOUROETHYLENE FILAMENTS INTO PARALLELISM WITH ONE ANOTHER SUBSTANTIALLY PERPENDICULAR TO THE FACES OF THE BATT, REMOVING ESSENTIALLY ALL EXCEPT THE POLYETHRAFLUOROETHYLENE FILAMENTS FROM THE PRODUCTS BY HEATING TO A TEMPERATURE BELOW 327* C., THE FUSION TEMPERATURE OF THE POLYETRAFLUOROETHYLENE FILAMENTS, AND ABOVE THE DECOMPOSITION TEMPERATURE OF THE OTHER FILAMENTS, AND DIMINISHING THE BATT BY RETRACTION OF THE FILAMENTS INTO A COHORENT MASS.
Claim 2
Dependent Claim
102 words
PROCESS FOR MAKING A FELT-LIKE LAMINAR NON-WOVEN PRODUCT COMPRISING FORMING A BATT OF FILAMENTS INCLUDING BOTH HEAT-RETRACTABLE POLYTETRAFLUOROETHYLENE FILAMENTS AND FILAMENTS CHARACTERIZED BY DECOMPOSITION INTO VOLATILE SUBSTANCES UPON HEATING TO A TEMPERATURE BELOW 327* C., FORCEABLY ORIENTING SOME OF THE POLYTETDRAFLOUROETHYLENE FILAMENTS INTO PARALLELISM WITH ONE ANOTHER SUBSTANTIALLY PERPENDICULAR TO THE FACES OF THE BATT, REMOVING ESSENTIALLY ALL EXCEPT THE POLYETHRAFLUOROETHYLENE FILAMENTS FROM THE PRODUCTS BY HEATING TO A TEMPERATURE BELOW 327* C., THE FUSION TEMPERATURE OF THE POLYETRAFLUOROETHYLENE FILAMENTS, AND ABOVE THE DECOMPOSITION TEMPERATURE OF THE OTHER FILAMENTS, AND DIMINISHING THE BATT BY RETRACTION OF THE FILAMENTS INTO A COHORENT MASS.
References Cited (Backward Citations)
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Cited
US2336797A
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US2181043A
Cited
US2437689A
Cited
US2277049A
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US2685707A
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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) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |