US3235935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making synthetic fibre felt
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1963-05-14
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Granted: 1966-02-22
•
Expires: 1983-05-14
Abstract
No abstract record available.
Inventors
- 👤 Daruwalla Dolly Faredoon
- 👤 Parlour Brian Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:30
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/10; D04; D04H; D04H3/00; D04H3/08; D04H3/10; Y; Y10; Y10T; Y10T442/00; Y10T442/50; Y10T442/56; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/632
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF MAKING A FELT WHICH COMPRISES ASSEMBLING UNDER TENSION IN SUBSTANTIALLY ALIGNED RELATIONSHIP CONTINUOUS MAN-MADE FIBRES CAPABLE OF BEING RETRACTED INTO CRIMPED CONDITION, RELAXING THE FIBRES INTO A CRIMPED CONDITION TO FORM A MAT IN WHICH THE CRIMPED CONTINUOUS FIBRES EXTEND SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE MAT AND EFFECTING CONSOLIDATION OF THE MAT BY NEEDLING WITH BARBED NEEDLES.
Claim 2
Independent Claim
63 words
A METHOD OF MAKING A FELT WHICH COMPRISES ASSEMBLING UNDER TENSION IN SUBSTANTIALLY ALIGNED RELATIONSHIP CONTINUOUS MAN-MADE FIBRES CAPABLE OF BEING RETRACTED INTO CRIMPED CONDITION, RELAXING THE FIBRES INTO A CRIMPED CONDITION TO FORM A MAT IN WHICH THE CRIMPED CONTINUOUS FIBRES EXTEND SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE MAT AND EFFECTING CONSOLIDATION OF THE MAT BY NEEDLING WITH BARBED NEEDLES.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |