Patent US1972870A successfully refreshed from Google Patents.
US1972870A
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US
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Sweeper
Assignee: IRVING H VOGEL
•
Filing: 1933-03-16
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Granted: 1934-09-11
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Expires: 1953-03-16
Abstract
No abstract record available.
Inventors
- 👤 Charles J Christesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:37
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4091; A47L11/32; A47L11/33; A47L11/4013; A47L11/4025; A47L11/4052; A47L11/4055; A47L11/4061; A47L11/4063; A47L11/4069; A47L11/4072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-09-10 | 1938-03-12 | 1938-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-10 | 1942-03-12 | 1942-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-10 | 1946-03-12 | 1946-09-11 | $7700.00 | Window Closed / Lapsed |