US3437510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape binder
Assignee: Ampex Corp
•
Filing: 1963-11-07
•
Granted: 1969-04-08
•
Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Frank Diaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:37
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8035; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7021; G11B5/7022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE PROCESS OF MAKING A MAGNETIC RECORDING MEDIUM COMPRISING DISPERSING FINELY DIVIDED MAGNETIC PARTICLES IN A MIXTURE OF A POLYESTER RESIN HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000, A DIPHENYLMETHANE DIISOCYANATE POLYURETHANE PREPOLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1100 TO ABOUT 5000 AND A SOLVENT WHEREIN THE MIXTURE CONTAINS, ON A RESIN SOLIDS BASIS, FROM ABOUT 25% TO
Claim 2
Dependent Claim
61 words
THE PROCESS OF MAKING A MAGNETIC RECORDING MEDIUM COMPRISING DISPERSING FINELY DIVIDED MAGNETIC PARTICLES IN A MIXTURE OF A POLYESTER RESIN HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000, A DIPHENYLMETHANE DIISOCYANATE POLYURETHANE PREPOLYMER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1100 TO ABOUT 5000 AND A SOLVENT WHEREIN THE MIXTURE CONTAINS, ON A RESIN SOLIDS BASIS, FROM ABOUT 25% TO
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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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |