US2449078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator apparatus
Assignee: RCA Corp
•
Filing: 1943-03-15
•
Granted: 1948-09-14
•
Expires: 1963-03-15
Abstract
No abstract record available.
Inventors
- 👤 Nils E Lindenblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:54
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE201759C
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US926066A
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FR16859E
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FR19067E
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US1295206A
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US1445662A
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US1474376A
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US2234834A
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US2241050A
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US2247755A
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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) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |