Patent US2938550A successfully refreshed from Google Patents.
US2938550A
Expired / Lapsed
US
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Automatic tank filling device
Assignee: Parker Hannifin Corp
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Filing: 1956-08-17
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Granted: 1960-05-31
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Expires: 1976-08-17
Abstract
No abstract record available.
Inventors
- 👤 Carl E Klamm
- 👤 Donald T Boody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:10
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/44; B67D7/46; F; F16; F16K; F16K21/00; F16K21/04; F16K21/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |