US2506731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing tarnishing of the surfaces of silverware
Assignee: Celanese Corp
•
Filing: 1945-01-25
•
Granted: 1950-05-09
•
Expires: 1965-01-25
Abstract
No abstract record available.
Inventors
- 👤 Clayton James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:52
CPC Classifications
C; C23; C23F; C23F15/00; B; B65; B65D; B65D25/00; B65D25/14; B65D81/00; B65D81/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF PREVENTING TARNISHING OF THE SURFACES OF SILVERWARE, WHICH COMPRISES PLACING SAID SILVERWARD IN A COVERING SHAPED TO RECEIVE SAID SILVERWARD, SAID COVERING COMPRISING A FABRIC OF CLOSELY WOVEN CONSTRUCTION CONTAINING FILAMENTARY MATERIALS HAVING A BASIS OF A LOWER ALIPHATIC ACID ESTER OF CELLULOSE.
Claim 2
Independent Claim
46 words
A METHOD OF PREVENTING TARNISHING OF THE SURFACES OF SILVERWARE, WHICH COMPRISES PLACING SAID SILVERWARD IN A COVERING SHAPED TO RECEIVE SAID SILVERWARD, SAID COVERING COMPRISING A FABRIC OF CLOSELY WOVEN CONSTRUCTION CONTAINING FILAMENTARY MATERIALS HAVING A BASIS OF A LOWER ALIPHATIC ACID ESTER OF CELLULOSE.
References Cited (Backward Citations)
US312954A
Cited
USRE18379E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |