US3442248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic indicating device
Assignee: United Parmatic Corp
•
Filing: 1967-01-11
•
Granted: 1969-05-06
•
Expires: 1987-01-11
Abstract
No abstract record available.
Inventors
- 👤 John Parkinson
- 👤 Alfred Eibich
- 👤 Edward T Saylor Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:53
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; H01H35/38; H01H5/00; H01H5/02; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2704156A
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US2834938A
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US2887230A
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US3077854A
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GB895748A
Cited
US3154049A
Cited
US3220375A
Cited
US3364897A
Cited
US3366758A
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US3373352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |