US2968069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cleaning and felting fibrous material
Assignee: Johns Manville Corp
•
Filing: 1956-01-30
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Granted: 1961-01-17
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Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Edward R Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:02
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/10; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/4226; D04H1/70; D04H1/72; D04H1/732
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE78030C
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US2153739A
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US2255206A
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US2403740A
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US2715755A
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US2646593A
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US2825933A
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US2810163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |