US3287474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing non-woven fabrics
Assignee: Eastman Kodak Co
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Filing: 1963-08-20
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Granted: 1966-11-22
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Expires: 1983-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert C Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:27
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF PREPARING A BONDED NON-WOVEN FIBROUS SHEET COMPRISING THE STEPS OF FORMING A HEAT FUSIBLE BINDER MATERIAL AND FIBERS INTO A MAT, PLACING SAID MAT BETWEEN AT LEAST TWO HIGH VOLTAGE ELECTRODES, AND PRODUCING HIGH VOLTAGE ELECTRICAL SPARKS BETWEEN SAID HIGH VOLTAGE ELECTRODES AND THROUGH SAID WEB THEREBY INDUCING INTERNAL HEATING OF SAID WEB SO THAT THE HEAT FUSIBLE BINDER MATERIAL IS CURED THUS PRODUCING A BONDED NON-WOVEN FIBROUS SHEET
Claim 2
Independent Claim
72 words
A METHOD OF PREPARING A BONDED NON-WOVEN FIBROUS SHEET COMPRISING THE STEPS OF FORMING A HEAT FUSIBLE BINDER MATERIAL AND FIBERS INTO A MAT, PLACING SAID MAT BETWEEN AT LEAST TWO HIGH VOLTAGE ELECTRODES, AND PRODUCING HIGH VOLTAGE ELECTRICAL SPARKS BETWEEN SAID HIGH VOLTAGE ELECTRODES AND THROUGH SAID WEB THEREBY INDUCING INTERNAL HEATING OF SAID WEB SO THAT THE HEAT FUSIBLE BINDER MATERIAL IS CURED THUS PRODUCING A BONDED NON-WOVEN FIBROUS SHEET
References Cited (Backward Citations)
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US2433412A
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US2406714A
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US2476283A
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US3081485A
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |