Patent US4803838A successfully refreshed from Google Patents.
Patent US3307961A successfully refreshed from Google Patents.
US3307961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing air permeable sheet material
Assignee: Evonik Operations GmbH
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Filing: 1963-11-21
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Granted: 1967-03-07
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 Stiehl Karl
- 👤 Oberlander Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:08
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/007; D06N3/0077; D06N3/0043; D06N3/0054; D06N3/0075; D06N7/00; D06N7/0092; D06N2213/00; D06N2213/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF PRODUCING AIR PERMEABLE THERMOPLASTIC SHEET MATERIAL REENFORCED WITH A FIBER FABRIC WHICH COMPRISES COATING AT LEAST ONE SIDE OF AN OPEN MESHED FIBER FABRIC WITH A CONTINUOUS COATING OF A THERMOPLASTIC SYNTHETIC RESIN, EMBOSSING SUCH COATING AT A TEMPERATURE WITHIN THE THERMOPLASTIC RANGE THEREOF WITH A DECORATIVE DESIGN WHILE SIMULTANEOUSLY IN THE SAME OPERATION EMBOSSING SUCH COATING SO DEEPLY AS TO PROVIDE SPACED HOLLOW NOB LIKE PROTRUSIONS FROM AT LEAST ONE SIDE THEREOF AND REMOVING SUCH NOB LIKE PROTRUSIONS TO PROVIDE SPACED OPENINGS IN SUCH SHEET MATERIAL.
Claim 2
Independent Claim
90 words
A METHOD OF PRODUCING AIR PERMEABLE THERMOPLASTIC SHEET MATERIAL REENFORCED WITH A FIBER FABRIC WHICH COMPRISES COATING AT LEAST ONE SIDE OF AN OPEN MESHED FIBER FABRIC WITH A CONTINUOUS COATING OF A THERMOPLASTIC SYNTHETIC RESIN, EMBOSSING SUCH COATING AT A TEMPERATURE WITHIN THE THERMOPLASTIC RANGE THEREOF WITH A DECORATIVE DESIGN WHILE SIMULTANEOUSLY IN THE SAME OPERATION EMBOSSING SUCH COATING SO DEEPLY AS TO PROVIDE SPACED HOLLOW NOB LIKE PROTRUSIONS FROM AT LEAST ONE SIDE THEREOF AND REMOVING SUCH NOB LIKE PROTRUSIONS TO PROVIDE SPACED OPENINGS IN SUCH SHEET MATERIAL.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |