US2580609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cigarette paper
Assignee: Ecusta Paper Corp
•
Filing: 1950-08-02
•
Granted: 1952-01-01
•
Expires: 1970-08-02
Abstract
No abstract record available.
Inventors
- 👤 Milton O Schur
- 👤 Robert M Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:17
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A COMBUSTIBLE, CELLULOSE, CIGARETTE PAPER CONTAINING A CARBONATE FILLER AND APPROXIMATELY 0.05% TO 0.6% OF A QUARTERNARY AMMONIUM SALT SELECTED FORM THE GROUP CONSISTING OF QUARTERNARY AMMONIUM PHOSPHATE AND PHOSPHITE SALTS (EXPRESSED AS PO4), HAVING A QUATERNARY AMMONIUM CATION OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
43 words
A COMBUSTIBLE, CELLULOSE, CIGARETTE PAPER CONTAINING A CARBONATE FILLER AND APPROXIMATELY 0.05% TO 0.6% OF A QUARTERNARY AMMONIUM SALT SELECTED FORM THE GROUP CONSISTING OF QUARTERNARY AMMONIUM PHOSPHATE AND PHOSPHITE SALTS (EXPRESSED AS PO4), HAVING A QUATERNARY AMMONIUM CATION OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2503267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |