Patent US2985358A successfully refreshed from Google Patents.
US2985358A
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US
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Air pumps
Assignee: WINSLOW Manufacturing CORP
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Filing: 1958-02-13
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Granted: 1961-05-23
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Expires: 1978-02-13
Abstract
No abstract record available.
Inventors
- 👤 Lee Aaron
- 👤 Carl Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0005; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1376857A
Cited
US1565029A
Cited
GB290304A
Cited
US2023466A
Cited
US2278715A
Cited
US2471796A
Cited
US2710137A
Cited
US2682281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |