US3436797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for charging and combining continuous filaments of different polymeric composition to form a nonwoven web
Assignee: EIDP Inc
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Filing: 1965-03-08
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Granted: 1969-04-08
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Walter L Graf
- 👤 Francis Joseph Medeiros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:01
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |