Patent US2521178A successfully refreshed from Google Patents.
US2521178A
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US
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Automatic brake for springtensioned take-up reels
Assignee: Vacuum Cleaner Corp of America
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Filing: 1946-03-22
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Granted: 1950-09-05
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Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Moletti Adolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:20
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/34; B65H75/38; B65H75/44; B65H75/4436; B65H75/4442; B65H75/4447; H; H02; H02G; H02G11/00; H02G11/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US291001A
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US667887A
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US715691A
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US1658561A
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US1948158A
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US2159004A
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US2391840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |