Patent US2443550A successfully refreshed from Google Patents.
US2443550A
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US
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Beer control and pipe-cleaning apparatus
Assignee: Individual
•
Filing: 1944-12-08
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Granted: 1948-06-15
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Expires: 1964-12-08
Abstract
No abstract record available.
Inventors
- 👤 Michael J Zwosta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:10
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/032; B08B9/0321; B08B9/0323; B67; B67D; B67D1/00; B67D1/07; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3124; Y10T137/4238; Y10T137/4245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371188A
Cited
US841722A
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US930225A
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US932284A
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US1652710A
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US2066397A
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US2158381A
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US2263922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |