US3415441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for the infinitely variable capacity control of pistontype compressors
Assignee: Hoerbiger Ventilwerke GmbH and Co KG
•
Filing: 1967-02-06
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Granted: 1968-12-10
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Kehler Theodor Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:35
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1154798A
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US1759617A
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US1740967A
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US2047167A
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US2036846A
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US3255955A
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US3295748A
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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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |