US3545890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative compressor
Assignee: Rotron Manufacturing Co Inc
•
Filing: 1967-12-29
•
Granted: 1970-12-08
•
Expires: 1987-12-29
Abstract
No abstract record available.
Inventors
- 👤 Albert B Hubbard
- 👤 John C Larson
- 👤 Bohumir A Larys
- 👤 Lewis F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:07
CPC Classifications
F; F04; F04D; F04D23/00; F04D23/008; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; F04D29/00; F04D29/08; F04D29/16; F04D29/161; F04D29/58; F04D29/582; F04D29/5826; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51; F05D2250/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL84248C
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US1529815A
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DE701459C
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DE729453C
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DE868956C
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US2722892A
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US2970234A
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FR1281170A
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US3252421A
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US3279385A
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US3356033A
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US3375970A
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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) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |