Patent US2758200A successfully refreshed from Google Patents.
US2758200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light transmitters and diffusers
Assignee: Holophane Corp
•
Filing: 1950-07-22
•
Granted: 1956-08-07
•
Expires: 1970-07-22
Abstract
No abstract record available.
Inventors
- 👤 Franck Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:25
CPC Classifications
F; F21; F21V; F21V5/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB191510812A
Cited
GB189612884A
Cited
US627848A
Cited
GB190908183A
Cited
US944348A
Cited
US1092114A
Cited
US1277065A
Cited
US1761654A
Cited
FR729415A
Cited
US1970358A
Cited
US2099034A
Cited
US2486558A
Cited
US2702850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |