US2636646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compartmental powder box having rotary valve means in the partition separating the compartments
Assignee: Individual
•
Filing: 1948-07-26
•
Granted: 1953-04-28
•
Expires: 1968-07-26
Abstract
No abstract record available.
Inventors
- 👤 William B Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:39
CPC Classifications
A; A45; A45D; A45D33/00; A45D33/02; A45D33/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US457595A
Cited
US588045A
Cited
US1264499A
Cited
US2120849A
Cited
US2339644A
Cited
US2468153A
Cited
US2460444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |