Patent US2159568A successfully refreshed from Google Patents.
US2808345A
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Recording tape
Assignee: Robert Bosch GmbH
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Filing: 1954-04-06
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Granted: 1957-10-01
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Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Traub Eberhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/06; G01D15/08; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678; Y10T428/31703
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A RECORDING CARRIER COMPRISING, A LAYER OF INSULATING MATERIAL AND A SURFACE LAYER OF NICKEL HAVING A THICKNESS IN THE RANGE OF 0.01 TO 0.1 MICRONS HAVING A SPECIFIC SURFACE RESISTANCE OF 3 TO 20 OHMS SUPERIMPOSED ON SAID LAYER OF INSULTING MATERIAL.
Claim 2
Dependent Claim
43 words
A RECORDING CARRIER COMPRISING, A LAYER OF INSULATING MATERIAL AND A SURFACE LAYER OF NICKEL HAVING A THICKNESS IN THE RANGE OF 0.01 TO 0.1 MICRONS HAVING A SPECIFIC SURFACE RESISTANCE OF 3 TO 20 OHMS SUPERIMPOSED ON SAID LAYER OF INSULTING MATERIAL.
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |