Patent US2456033A successfully refreshed from Google Patents.
US2456033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoborate glass
Assignee: Eastman Kodak Co
•
Filing: 1946-04-06
•
Granted: 1948-12-14
•
Expires: 1966-04-06
Abstract
No abstract record available.
Inventors
- 👤 Sun Kuan-Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:01
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/23; F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1454; F02D41/1456; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901; Y10S501/903; Y10S501/906
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190708704A
Cited
US1143788A
Cited
US1327569A
Cited
US1623301A
Cited
US1529259A
Cited
US2056627A
Cited
US1971309A
Cited
GB492960A
Cited
US2282601A
Cited
US2255109A
Cited
US2272747A
Cited
US2262951A
Cited
US2269176A
Cited
US2334961A
Cited
US2397195A
Cited
US2394502A
Cited
US2393449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |