Patent US3758373A successfully refreshed from Google Patents.
US3758373A
Expired / Lapsed
US
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Spray-spun continuous tubular structure
Assignee: Veolia WTS Solutions USA Inc
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Filing: 1971-04-12
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Granted: 1973-09-11
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Expires: 1991-04-12
Abstract
Abstract A SPRAY-SPUN NONWOVEN TUBULAR STRUCTURE IS PRODUCED BY SPRAY SPINNING A FIBER-FORMING POLYMER ONTO THE INNER SURFACE OF A CIRCULAR FORMING BASE AND WITHDRAWING THE TUBE CONTINUOUSLY AS IT IS FORMED.
Inventors
- 👤 E Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:36
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D04H3/02; D04H3/07; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |