Patent US3433857A successfully refreshed from Google Patents.
US3433857A
Expired / Lapsed
US
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Method and apparatus for forming nonwoven sheets
Assignee: EIDP Inc
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Filing: 1967-02-03
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Granted: 1969-03-18
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Expires: 1987-02-03
Abstract
No abstract record available.
Inventors
- 👤 Hubert Wallace Dutton Jr
- 👤 Ray Frank Lees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:35
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D01; D01D; D01D4/00; D01D4/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798252A
Cited
US3302238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |