Patent US2784440A successfully refreshed from Google Patents.
US2784440A
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US
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Industrial sweeping machines
Assignee: Wayne Manufacturing Co
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Filing: 1955-05-26
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Granted: 1957-03-12
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Expires: 1975-05-26
Abstract
No abstract record available.
Inventors
- 👤 John L Newport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4041; A47L11/24; A47L11/4013; A47L11/4025; A47L11/4027; A47L11/4033; E; E01; E01H; E01H1/00; E01H1/08; E01H1/0827; E01H1/0854
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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |