Patent US2770811A successfully refreshed from Google Patents.
US1534451A
Expired / Lapsed
US
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Combined rotary unit
Assignee: Individual
•
Filing: 1922-04-11
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Granted: 1925-04-21
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Expires: 1942-04-11
Abstract
No abstract record available.
Inventors
- 👤 Kauter Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:55
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/0646
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-04-20 | 1928-10-20 | 1929-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-04-20 | 1932-10-20 | 1933-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-04-20 | 1936-10-20 | 1937-04-21 | $7700.00 | Window Closed / Lapsed |