US3301740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pervious composite fabric
Assignee: Evonik Operations GmbH
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Filing: 1963-06-06
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Granted: 1967-01-31
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Expires: 1983-06-06
Abstract
No abstract record available.
Inventors
- 👤 Stiehl Karl
- 👤 Franz Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
B; B32; B32B; B32B27/00; D; D06; D06N; D06N7/00; D06N7/0092; D06N2209/00; D06N2209/12; D06N2209/121; D06N2211/00; D06N2211/10; D06N2211/12; D06N2211/14; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24802; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172; Y10T442/178
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A COMPOSITE FABRIC COMPRISING AN AIR PERVIOUS FABRIC BASE (1) HAVING AT LEAST ONE SURFACE UNITED WITH A SUPERPOSED RELATIVELY OPEN FABRIC (2) THE THREADS OF WHICH ARE SURROUNDED BY A COATING OF PLIABLE SYNTHETIC RESIN THE THREAD COUNT AND COATING OF PLIABLE SYNTHETIC RESIN OF SIAD OPEN FABRIC (2) BEING SUCH THAT SUCH COMPOSITE FABRIC HAS AN AIR PERMEABILITY OF AT LEAST 1/2 LITER PER MINUTE PER 100 CM.2 AREA AT A PRESSURE DIFFERENTIAL OF 20 MM. WATER COLUMN SAID AIR PERVIOUS FABRIC BASE (1) HAVING A SUBSTANTIALLY HIGHER THREAD COUNT THAN SAID RELATIVELY OPEN FABRIC AND BEING ESSENTIALLY UNCOATED BY SAID PLIABLE SYNTHETIC RESIN OTHER THAN BY THAT CARRIED BY THE SUPERPOSED RELATIVELY MORE OPEN FARIC (2) UNITED THEREWITH.
Claim 2
Dependent Claim
121 words
A COMPOSITE FABRIC COMPRISING AN AIR PERVIOUS FABRIC BASE (1) HAVING AT LEAST ONE SURFACE UNITED WITH A SUPERPOSED RELATIVELY OPEN FABRIC (2) THE THREADS OF WHICH ARE SURROUNDED BY A COATING OF PLIABLE SYNTHETIC RESIN THE THREAD COUNT AND COATING OF PLIABLE SYNTHETIC RESIN OF SIAD OPEN FABRIC (2) BEING SUCH THAT SUCH COMPOSITE FABRIC HAS AN AIR PERMEABILITY OF AT LEAST 1/2 LITER PER MINUTE PER 100 CM.2 AREA AT A PRESSURE DIFFERENTIAL OF 20 MM. WATER COLUMN SAID AIR PERVIOUS FABRIC BASE (1) HAVING A SUBSTANTIALLY HIGHER THREAD COUNT THAN SAID RELATIVELY OPEN FABRIC AND BEING ESSENTIALLY UNCOATED BY SAID PLIABLE SYNTHETIC RESIN OTHER THAN BY THAT CARRIED BY THE SUPERPOSED RELATIVELY MORE OPEN FARIC (2) UNITED THEREWITH.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |