Patent US3594984A successfully refreshed from Google Patents.
Patent US3205121A successfully refreshed from Google Patents.
US3205121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of endless magnetic sound tapes
Assignee: Agfa Gevaert NV
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Filing: 1961-03-14
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Granted: 1965-09-07
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Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Eichler Wolfgang
- 👤 Abeck Wilhelm
- 👤 Krones Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:32
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74; C; C08; C08L; C08L67/00; C08L67/02; G11B5/62; G11B5/68; G11B5/70; G11B5/73; G11B5/739; G11B5/73923; G11B5/73927; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/19; Y10T428/192
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
IN A PROCESS FOR FORMING AN ENDLESS MAGNETIC RECORDING TAPE HAVING A SUPPORTING LAYER OF POLYETHYLENE TEREPHTHALATE AND A MAGNETIZABLE LAYER, THE IMPROVEMENT CONSISTING OF COATING ONE SIDE OF A FIRST MAGNETIC TAPE WITH A POLYMERIC RESIN-BASED ADHESIVE THE RESIN OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF I A COPOLYMER OF BUTADIENE AND ACRYLONITRILE AND II POLYVINYL ISOBUTYL ETHER, APPLYING A SECOND MAGNETIC TAPE OF SUBSTANTIALLY THE SAME LENGTH TO THE COATED SIDE OF SAID FIRST MAGNETIC RECORDING TAPE, EXTENDING ONE END OF SAID SECOND TAPE SUBSTANTIALLY BEYOND ONE END OF SAID FIRST TAPE AND ABUTTING THE TWO ENDS OF SAID FIRST MAGNETIC RECORDING TAPE AND THE TWO ENDS OF SAID SECOND TAPE, WHEREIN THE POINTS OF ABUTMENT OR SPLICE ARE STAGGERED.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR FORMING AN ENDLESS MAGNETIC RECORDING TAPE HAVING A SUPPORTING LAYER OF POLYETHYLENE TEREPHTHALATE AND A MAGNETIZABLE LAYER, THE IMPROVEMENT CONSISTING OF COATING ONE SIDE OF A FIRST MAGNETIC TAPE WITH A POLYMERIC RESIN-BASED ADHESIVE THE RESIN OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF I A COPOLYMER OF BUTADIENE AND ACRYLONITRILE AND II POLYVINYL ISOBUTYL ETHER, APPLYING A SECOND MAGNETIC TAPE OF SUBSTANTIALLY THE SAME LENGTH TO THE COATED SIDE OF SAID FIRST MAGNETIC RECORDING TAPE, EXTENDING ONE END OF SAID SECOND TAPE SUBSTANTIALLY BEYOND ONE END OF SAID FIRST TAPE AND ABUTTING THE TWO ENDS OF SAID FIRST MAGNETIC RECORDING TAPE AND THE TWO ENDS OF SAID SECOND TAPE, WHEREIN THE POINTS OF ABUTMENT OR SPLICE ARE STAGGERED.
Claim 3
Dependent Claim
84 words
A COMPOSITE ENDLESS DISTORTION-FREE RECORDING TAPE COMPRISING A MAGNETIZABLE LAYER COATED ONTO A SUPPORT OF POLYETHYLENE TEREPHTHALATE, THE IMPROVEMENT BEING THAT SAID RECORDING TAPE IS JOINED OVER ITS ENTIRE LENGTH TO A SECOND TAPE OF SUBSTANTIALLY EQUAL LENGTH WITH A POLYMERIC RESIN-BASED DHESIVE THE RESIN OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF I A COPOLYMER OF BUTADIENE AND ACRYLONITRILE AND II POLYVINYL ISOBUTYL ETHER, THE TWO ENDS OF EACH TAPE BEING ARRANGED IN ABUTTING RELATIONSHIP AND THE POINT OF ABUTMENT BEING STAGGERED.
Claim 4
Dependent Claim
84 words
A COMPOSITE ENDLESS DISTORTION-FREE RECORDING TAPE COMPRISING A MAGNETIZABLE LAYER COATED ONTO A SUPPORT OF POLYETHYLENE TEREPHTHALATE, THE IMPROVEMENT BEING THAT SAID RECORDING TAPE IS JOINED OVER ITS ENTIRE LENGTH TO A SECOND TAPE OF SUBSTANTIALLY EQUAL LENGTH WITH A POLYMERIC RESIN-BASED DHESIVE THE RESIN OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF I A COPOLYMER OF BUTADIENE AND ACRYLONITRILE AND II POLYVINYL ISOBUTYL ETHER, THE TWO ENDS OF EACH TAPE BEING ARRANGED IN ABUTTING RELATIONSHIP AND THE POINT OF ABUTMENT BEING STAGGERED.
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |