US2469957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dusting powder and method of making same
Assignee: Individual
•
Filing: 1946-12-09
•
Granted: 1949-05-10
•
Expires: 1966-12-09
Abstract
No abstract record available.
Inventors
- 👤 James E Fenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:48
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/30; A61K47/36; A61K9/00; A61K9/0012; A61K9/0014
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1507624A
Cited
US2113034A
Cited
US2246635A
Cited
US2397018A
Cited
US2438855A
Cited
US2417611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |