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Patent US2934815A successfully refreshed from Google Patents.
US2934815A
Expired / Lapsed
US
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Method of manufacturing a collector ring
Assignee: Engelhard Industries Inc
•
Filing: 1954-03-09
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Granted: 1960-05-03
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Expires: 1974-03-09
Abstract
No abstract record available.
Inventors
- 👤 Max J Stumbock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:12
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/10; Y; Y10; Y10S; Y10S200/00; Y10S200/07; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T29/49799
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2424650A
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US2638660A
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GB644565A
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US2455864A
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US2590160A
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US2633481A
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US2743629A
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US2860403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |