US3024318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass gap spacer for magnetic heads
Assignee: US Philips Corp
•
Filing: 1956-09-11
•
Granted: 1962-03-06
•
Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Duinker Simon
- 👤 Bos Jules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1961706A
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US2238599A
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US2514577A
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US2703661A
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US2674659A
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US2674031A
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US2677019A
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US2676392A
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US2711945A
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US2933565A
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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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |