Patent US2609320A successfully refreshed from Google Patents.
US2609320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making flexible unwoven fabric
Assignee: Johns Manville Corp
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Filing: 1950-12-09
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Granted: 1952-09-02
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Expires: 1970-12-09
Abstract
No abstract record available.
Inventors
- 👤 Modigliani Piero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF FORMING AN UNWOVEN FABRIC COMPRISING FORMING A CONDENSED MAT OF A PLURALITY OF LAYERS OF FILAMENTS WITH THE FILAMENTS EXTENDING GENERALLY TRANSVERSELY OF THE MAT AND WITH THE FILAMENTS OF ADJACENT LAYERS CROSSING AT ACUTE ANGLES, APPLYING AN UNSET BINDER TO THE MAT, EXPANDING THE MAT IN A DIRECTION TRANSVERSELY OF THE GENERAL LAY OF THE FILAMENTS TO FORM AN ELONGATED WEB, AND SETTING THE BINDER.
Claim 2
Independent Claim
69 words
A METHOD OF FORMING AN UNWOVEN FABRIC COMPRISING FORMING A CONDENSED MAT OF A PLURALITY OF LAYERS OF FILAMENTS WITH THE FILAMENTS EXTENDING GENERALLY TRANSVERSELY OF THE MAT AND WITH THE FILAMENTS OF ADJACENT LAYERS CROSSING AT ACUTE ANGLES, APPLYING AN UNSET BINDER TO THE MAT, EXPANDING THE MAT IN A DIRECTION TRANSVERSELY OF THE GENERAL LAY OF THE FILAMENTS TO FORM AN ELONGATED WEB, AND SETTING THE BINDER.
References Cited (Backward Citations)
US2578534A
Cited
US2546230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |