US2689187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and compositions for forming nitrocellulose films
Assignee: RCA Corp
•
Filing: 1951-09-29
•
Granted: 1954-09-14
•
Expires: 1971-09-29
Abstract
No abstract record available.
Inventors
- 👤 Soren M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:18
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A FILM-SPREADING COMPOSITION CONSISTING ESSENTIALLY OF NITROCELLULOSE AND LIQUID IN WHICH SAID NITROCELLULOSE CONSTITUTES NOT MORE THAN ABOUT 20% BY WEIGHT AND SAID LIQUID CONSTITUTES THE REMAINDER AND IN WHICH THE LIQUID CONSISTS ESSENTIALLY OF (1) A SUBSTANTIALLY NON-VOLATILE, WATER-INSOLUBLE PLASTICIZER FOR SAID NITROCELLULOSE, PRESENT IN AN AMOUNT OF ABOUT 1/10 TO 1/2 THE WEIGHT OF SAID NITROCELLULOSE, (2) OF SUBSTANTIALLY WATERINSOLUBLE SOLVENT SELECTED FROM THE CLASS CONSISTING OF OCTYL ACETATE, ETHYL BUTYL ACETATE AND ETHYL AMYL ACETATE IN AN AMOUNT EQUAL TO ABOUT 2 TO 4 TIMES THE WEIGHT OF THE NITROCELLULOSE, AND (3) A SOLVENT SLECTED FROM THE CLASS CONSISTING OF ETHYL ACETATE, CYCLOHEXANONE AND METHYL ISOBUTYL KETONE CONSTITUTING THE REMAINDER.
Claim 2
Dependent Claim
113 words
A FILM-SPREADING COMPOSITION CONSISTING ESSENTIALLY OF NITROCELLULOSE AND LIQUID IN WHICH SAID NITROCELLULOSE CONSTITUTES NOT MORE THAN ABOUT 20% BY WEIGHT AND SAID LIQUID CONSTITUTES THE REMAINDER AND IN WHICH THE LIQUID CONSISTS ESSENTIALLY OF (1) A SUBSTANTIALLY NON-VOLATILE, WATER-INSOLUBLE PLASTICIZER FOR SAID NITROCELLULOSE, PRESENT IN AN AMOUNT OF ABOUT 1/10 TO 1/2 THE WEIGHT OF SAID NITROCELLULOSE, (2) OF SUBSTANTIALLY WATERINSOLUBLE SOLVENT SELECTED FROM THE CLASS CONSISTING OF OCTYL ACETATE, ETHYL BUTYL ACETATE AND ETHYL AMYL ACETATE IN AN AMOUNT EQUAL TO ABOUT 2 TO 4 TIMES THE WEIGHT OF THE NITROCELLULOSE, AND (3) A SOLVENT SLECTED FROM THE CLASS CONSISTING OF ETHYL ACETATE, CYCLOHEXANONE AND METHYL ISOBUTYL KETONE CONSTITUTING THE REMAINDER.
Claim 3
Dependent Claim
23 words
A FILM-SPREADING COMPOSITION CONSISTING ESSENTIALLY IN PER CENT BY WEIGHT OF NITROCELLULOSE 10%, DIOCTYL PHTHALATE 2.5%, OCTYL ACETATE 27.5%, AND MESITYL OXIDE 60%.
Claim 4
Dependent Claim
23 words
A FILM-SPREADING COMPOSITION CONSISTING ESSENTIALLY IN PER CENT BY WEIGHT OF NITROCELLULOSE 10%, DIOCTYL PHTHALATE 2.5%, OCTYL ACETATE 27.5%, AND MESITYL OXIDE 60%.
References Cited (Backward Citations)
US1309981A
Cited
US1702181A
Cited
US826781A
Cited
US1434634A
Cited
US1653010A
Cited
GB387534A
Cited
US2015077A
Cited
US2064802A
Cited
US2086714A
Cited
US2098534A
Cited
US2088052A
Cited
CH217455A
Cited
US2562373A
Cited
US2485372A
Cited
US2631334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |