Patent US3388429A successfully refreshed from Google Patents.
Patent US2959325A successfully refreshed from Google Patents.
US2959325A
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Method and apparatus for dispensing dry powders
Assignee: Risdon Manufacturing Co
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Filing: 1954-08-26
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Granted: 1960-11-08
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Expires: 1974-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter C Beard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:39
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/007; A61K9/0073; A61K9/008; A61K31/00; A61K31/65; A61K9/10; A61K9/12; C; C09; C09K; C09K3/00; C09K3/30; Y; Y10; Y10S; Y10S424/00; Y10S424/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2529092A
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US2621014A
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US2662668A
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US2728495A
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US2798836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |