US3529349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing multiple magnetic heads
Assignee: US Philips Corp
•
Filing: 1968-01-30
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Granted: 1970-09-22
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Expires: 1988-01-30
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Henricus Maria Schoot
- 👤 Matthijs Henricus Mar Vrolijks
- 👤 Hans Peter Peloschek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; G11B5/265; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/4906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |