US3538564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a nonwoven fabric
Assignee: Union Carbide Corp
•
Filing: 1968-04-12
•
Granted: 1970-11-10
•
Expires: 1988-04-12
Abstract
No abstract record available.
Inventors
- 👤 George A Skoler
- 👤 Kenneth M Hillas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; D04H3/04; D04H3/08; D04H3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860090A
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US2339431A
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US2908064A
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US3022813A
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US3260640A
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US3340584A
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US3422511A
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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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |