Patent US3539666A successfully refreshed from Google Patents.
US3539666A
Expired / Lapsed
US
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Method for preparing a nonwoven fabriclike member
Assignee: WR Grace and Co
•
Filing: 1968-06-18
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Granted: 1970-11-10
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Expires: 1988-06-18
Abstract
No abstract record available.
Inventors
- 👤 Henry G Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:49
CPC Classifications
D; D04; D04H; D04H13/00; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29L; B29L2023/00; B29L2023/001; Y; Y10; Y10S; Y10S264/00; Y10S264/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2337927A
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US3254146A
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US2987767A
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US3271495A
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US3085293A
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US3197538A
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US3108324A
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US3248462A
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US3403203A
Cited
US3426111A
Cited
US3391051A
Cited
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 |