US2774679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating of plastic surfaces
Assignee: STRATHMORE Co
•
Filing: 1953-02-10
•
Granted: 1956-12-18
•
Expires: 1973-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robert K Remer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE METHOD OF TREATING THE SURFACE OF CELLULOSE ACETATE FILM WHICH COMPRISES SPRAYING A TRAVELING WEB OF SAID FILM WITH WATER CONTAINING FINELY DIVIDED ABRADIVE, AN ALKALI METAL HYDROXIDE AND AN ANHYDRIDE OF A LOWER ALKYL DIBASIC ACID.
Claim 2
Independent Claim
38 words
THE METHOD OF TREATING THE SURFACE OF CELLULOSE ACETATE FILM WHICH COMPRISES SPRAYING A TRAVELING WEB OF SAID FILM WITH WATER CONTAINING FINELY DIVIDED ABRADIVE, AN ALKALI METAL HYDROXIDE AND AN ANHYDRIDE OF A LOWER ALKYL DIBASIC ACID.
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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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |