US3481142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demonstration model of a hot air motor and pump
Assignee: Leybold Heraeus Verwaltung GmbH
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Filing: 1968-03-18
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Granted: 1969-12-02
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Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Harald Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:24
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F02G1/0435; F02G1/057; F25; F25B; F25B9/00; F25B9/14; G; G09; G09B; G09B25/00; G09B25/02; F02F; F02F7/00; F02F7/0085; F02F2007/0092; F02G2270/00; F02G2270/85; F05; F05C; F05C2225/00; F05C2225/08
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) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |