Patent US2641028A successfully refreshed from Google Patents.
US2641028A
Expired / Lapsed
US
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Apparatus for fiber collection
Assignee: Johns Manville Corp
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Filing: 1948-07-06
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Granted: 1953-06-09
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Expires: 1968-07-06
Abstract
No abstract record available.
Inventors
- 👤 Steele Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:42
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/04; C03B37/05; C03B37/055; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/70; D04H1/72; D04H1/732
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |