US2730113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric carbon duster and method
Assignee: Parks and Woolson Machine Co
•
Filing: 1954-02-01
•
Granted: 1956-01-10
•
Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Wilfred N Hadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:19
CPC Classifications
D; D06; D06C; D06C7/00; D06C7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE12128C
Cited
US504010A
Cited
US1555865A
Cited
US1746798A
Cited
US2211838A
Cited
GB606315A
Cited
US2633588A
Cited
US2629918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |