US3497918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making a nonwoven fibrous sheet
Assignee: EIDP Inc
•
Filing: 1967-04-06
•
Granted: 1970-03-03
•
Expires: 1987-04-06
Abstract
No abstract record available.
Inventors
- 👤 Frank Scott Pollock Jr
- 👤 James Gerald Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:01
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/11; D04; D04H; D04H3/00; D04H3/08; D04H3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US65339A
Cited
US757035A
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US1617030A
Cited
US1613318A
Cited
US1753521A
Cited
US2192944A
Cited
US2304130A
Cited
US2748045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |