US3179831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary electrical machine having disk type rotor and layer of polymerized tetrafluorethylene on field pole surfaces
Assignee: Normacem SA
•
Filing: 1960-04-18
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Granted: 1965-04-20
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Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 Moressee Georges
- 👤 Dechet Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:35
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/26; H02K5/00; H02K5/04; H02K5/16; H02K5/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2974284A
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US1897184A
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US2781464A
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |