Patent US2547718A successfully refreshed from Google Patents.
US2547718A
Expired / Lapsed
US
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Combined duster and blower
Assignee: Individual
•
Filing: 1946-03-23
•
Granted: 1951-04-03
•
Expires: 1966-03-23
Abstract
No abstract record available.
Inventors
- 👤 Valdemar A Potholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:35
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE188836C
Cited
US814235A
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US1065256A
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US1757650A
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US2237984A
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US2268740A
Cited
US2315996A
Cited
US2391070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |