US2521801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for various machines through a leonard group or the like, including a motor with a field-controlled speed
Assignee: Individual
•
Filing: 1945-04-11
•
Granted: 1950-09-12
•
Expires: 1965-04-11
Abstract
No abstract record available.
Inventors
- 👤 Mozzanini George Gabriel
- 👤 Lebertre Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:36
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1305031A
Cited
US865813A
Cited
US924786A
Cited
US1121544A
Cited
US1150035A
Cited
US1089658A
Cited
US1389342A
Cited
US1392255A
Cited
US1350937A
Cited
US1411586A
Cited
US1943498A
Cited
US1966077A
Cited
DE660836C
Cited
US2453462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |