US2739901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ruthenium containing glasses and stains
Assignee: Individual
•
Filing: 1952-07-14
•
Granted: 1956-03-27
•
Expires: 1972-07-14
Abstract
No abstract record available.
Inventors
- 👤 Paul G Herold
- 👤 Theodore J M Planje
- 👤 John C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:39
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/10; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/076; C03C3/089; C03C3/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A GLASS COMPOSITION CONTAINING FROM 0.001% TO 20.0% OF A MATERIAL SELECTED FROM THE GROUP CONSISTING RUTHENIUM AND RUTHENIUM OXIDE.
Claim 2
Dependent Claim
20 words
A GLASS COMPOSITION CONTAINING FROM 0.001% TO 20.0% OF A MATERIAL SELECTED FROM THE GROUP CONSISTING RUTHENIUM AND RUTHENIUM OXIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |