Patent US2998048A successfully refreshed from Google Patents.
US2998048A
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US
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Method and apparatus for producing fibrous structures
Assignee: WALSCO Co
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Filing: 1954-12-21
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Granted: 1961-08-29
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Expires: 1974-12-21
Abstract
No abstract record available.
Inventors
- 👤 Sittel Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:05
CPC Classifications
D; D04; D04H; D04H1/00; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2491889A
Cited
US2561449A
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US2451934A
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US2466906A
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US2493194A
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US2527501A
Cited
US2592602A
Cited
US2686141A
Cited
US2790741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |