Patent US2992604A successfully refreshed from Google Patents.
US2992604A
Expired / Lapsed
US
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Forced air under body ventilating device
Assignee: TROTMAN
•
Filing: 1958-06-09
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Granted: 1961-07-18
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Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Trotman
- 👤 Lachlan W Child
- 👤 Louis G Carmick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:10
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/56; B60N2/5607; B60N2/5621; B60N2/5635; B60N2/5657; B60N2/58; B60N2/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2158801A
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US2512559A
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US2722266A
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US2804912A
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US2801681A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |