US2525049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose titanate film production
Assignee: EIDP Inc
•
Filing: 1946-08-22
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Granted: 1950-10-10
•
Expires: 1966-08-22
Abstract
No abstract record available.
Inventors
- 👤 Signaigo Frank Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:38
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A PROCESS FOR PRODUCING A TRANSPARENT CELLULOSE TITANATE FILM COMPRISING SOAKING A REGENERATED CELLULOSIC FILM IN A TITANATING AQUEOUS SOLUTION OF TITANYL SULFATE SUFFICIENT IN AMOUNT TO COMBINE WITH THE CELLULOSE FROM 1-30% BY WEIGHT, CALCULATED AS TIO2, OF TITANIUM, AND THEN WASHING THE TREATED PRODUCT WITH A DILUTE ALKALINE SOLUTION.
References Cited (Backward Citations)
US1717483A
Cited
GB343121A
Cited
US2009657A
Cited
US2009015A
Cited
US2122793A
Cited
US2404910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |