US3240580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass polishing compositions of rare earth nitrates
Assignee: Libbey Owens Ford Glass Co
•
Filing: 1961-04-03
•
Granted: 1966-03-15
•
Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 Harold M Alexander
- 👤 Joseph D Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:28
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454; C09K3/1463
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A COMPOSITION FOR USE IN POLISHING GLASS CONSISTING ESSENTIALLY OF WATER, CERIUM OXIDE AND A MIXTURE OF RARE EARTH NITRATES CONTAINING AT LEAST 35% OF CEROUS NITRATE AND AT LEAST 10% OTHER RARE EARTH NITRATES IN PROPORTIONS OF 100 PARTS BY WEIGHT OF WATER, FROM 1 TO 60 PARTS OF CERIUM OXIDE AND FROM 0.5 TO 10 PARTS BY WEIGHT OF A MIXTURE OF THE RARE EARTH NITRATES.
References Cited (Backward Citations)
US2554070A
Cited
US2597182A
Cited
US2744001A
Cited
US2816824A
Cited
US2955031A
Cited
US3071455A
Cited
US3097083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |