US2584892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing sound recording disks
Assignee: EMI Ltd
•
Filing: 1947-07-14
•
Granted: 1952-02-05
•
Expires: 1967-07-14
Abstract
No abstract record available.
Inventors
- 👤 Lord William Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:58
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2401/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF MANUFACTURING SECOND RECORDING DISCS COMPRISING PROVIDING A SYNTHETIC RESIN BASE CONSISTING ESSENTIALLY OF POLYVINYL CHLORIDE AND 5-15% BY WEIGHT OF A PLASTICIZER THEREFOR, PRESSING A SURFACE OF SAID BASE TO OBTAIN A POLISHED SURFACE, AND DEPOSITING ON SAID POLISHED SURFACE A FILM FROM A COLD SOLUTION COMPRISING NITROCELLULOSE, A PLASTICIZER FOR SAID NITROCELLULOSE, AND A SOLVENT COMBINATION CONSISTING OF 10-30% BY WEIGHT CYCLOHEXANONE AND THE REMAINDER BEING SOLVENTS FOR SAID NITROCELLULOSE.
Claim 2
Independent Claim
74 words
A METHOD OF MANUFACTURING SECOND RECORDING DISCS COMPRISING PROVIDING A SYNTHETIC RESIN BASE CONSISTING ESSENTIALLY OF POLYVINYL CHLORIDE AND 5-15% BY WEIGHT OF A PLASTICIZER THEREFOR, PRESSING A SURFACE OF SAID BASE TO OBTAIN A POLISHED SURFACE, AND DEPOSITING ON SAID POLISHED SURFACE A FILM FROM A COLD SOLUTION COMPRISING NITROCELLULOSE, A PLASTICIZER FOR SAID NITROCELLULOSE, AND A SOLVENT COMBINATION CONSISTING OF 10-30% BY WEIGHT CYCLOHEXANONE AND THE REMAINDER BEING SOLVENTS FOR SAID NITROCELLULOSE.
References Cited (Backward Citations)
US1146414A
Cited
US2006378A
Cited
US1932889A
Cited
US2030568A
Cited
GB489725A
Cited
US2206636A
Cited
GB484434A
Cited
GB570915A
Cited
US2417405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |