Patent US4345733A successfully refreshed from Google Patents.
Patent US3136905A successfully refreshed from Google Patents.
US3136905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore hole drilling motor
Assignee: Licentia Patent Verwaltungs GmbH
•
Filing: 1960-08-18
•
Granted: 1964-06-09
•
Expires: 1980-08-18
Abstract
No abstract record available.
Inventors
- 👤 Zapf Oskar
- 👤 Linsenmair Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:46
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN AN ELECTRIC MOTOR FOR USE IN BORE HOLES, THE COMBINATION WHICH COMPRISES: A PLURALITY OF ALIGNED HOLLOW ROTOR PORTIONS; COUPLING MEANS INTERCONNECTING CONSECUTIVE ROTOR PORTIONS TO FORM AN ELONGATED COMPOSITE HOLLOW ROTOR; AND A SINGLE CENTRAL TUBULAR MEMBER EXTENDING THROUGH SAID ELONGATED COMPOSITE HOLLOW ROTOR AND BEING FLUID-TIGHTLY CONNECTED TO THE ENDS THEREOF, SAID CENTRAL TUBULAR MEMBER BEING ROTATABLE WITH SAID ROTOR AND ADAPTED TO CONDUCT WATER UNDER PRESSURE THROUGH THE INTERIOR OF SAID ELONGATED COMPOSITE HOLLOW ROTOR.
Claim 2
Dependent Claim
79 words
IN AN ELECTRIC MOTOR FOR USE IN BORE HOLES, THE COMBINATION WHICH COMPRISES: A PLURALITY OF ALIGNED HOLLOW ROTOR PORTIONS; COUPLING MEANS INTERCONNECTING CONSECUTIVE ROTOR PORTIONS TO FORM AN ELONGATED COMPOSITE HOLLOW ROTOR; AND A SINGLE CENTRAL TUBULAR MEMBER EXTENDING THROUGH SAID ELONGATED COMPOSITE HOLLOW ROTOR AND BEING FLUID-TIGHTLY CONNECTED TO THE ENDS THEREOF, SAID CENTRAL TUBULAR MEMBER BEING ROTATABLE WITH SAID ROTOR AND ADAPTED TO CONDUCT WATER UNDER PRESSURE THROUGH THE INTERIOR OF SAID ELONGATED COMPOSITE HOLLOW ROTOR.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |