Patent US2421850A successfully refreshed from Google Patents.
US2421850A
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Assignee: GARDNER RICHARDSON CO
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Filing: 1944-09-01
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Granted: 1947-06-10
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Expires: 1964-09-01
Abstract
No abstract record available.
Inventors
- 👤 William A Ringler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:07
CPC Classifications
B; B65; B65D; B65D71/00; B65D71/0003; B65D71/0029; B65D71/0033; B65D71/004; B65D2571/00; B65D2571/00123; B65D2571/00129; B65D2571/00135; B65D2571/00141; B65D2571/00246; B65D2571/00253; B65D2571/00283; B65D2571/0029; B65D2571/00432; B65D2571/00456; B65D2571/00475; B65D2571/00512; B65D2571/00648; B65D2571/00654; B65D2571/0066; B65D2571/00709; B65D2571/00716
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1458170A
Cited
US2000870A
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US2171615A
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US2296937A
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US2206728A
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US2373851A
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US2335022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-09 | 1950-12-09 | 1951-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-09 | 1954-12-09 | 1955-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-09 | 1958-12-09 | 1959-06-10 | $7700.00 | Window Closed / Lapsed |