US2508939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispenser for powdered material
Assignee: Shellmar Products Corp
•
Filing: 1945-02-12
•
Granted: 1950-05-23
•
Expires: 1965-02-12
Abstract
No abstract record available.
Inventors
- 👤 Swart Jan De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:22
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/04; B65D47/00; B65D47/04; B65D47/20; B65D47/24; B65D47/248; B65D47/26; B65D47/28; B65D47/283; B65D83/00; B65D83/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US984752A
Cited
US1257910A
Cited
GB188264A
Cited
US1871175A
Cited
US1993401A
Cited
US2312730A
Cited
US2361663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |