US3524052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan-forming reflective optical system
Assignee: Union Carbide Corp
•
Filing: 1968-04-18
•
Granted: 1970-08-11
•
Expires: 1988-04-18
Abstract
No abstract record available.
Inventors
- 👤 Harden H Troue
- 👤 Richard C Eschenbach
- 👤 John R Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:19
CPC Classifications
F; F21; F21V; F21V7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
BE639884A
Cited
DE275840C
Cited
US1153446A
Cited
US1711480A
Cited
US2179161A
Cited
US3138333A
Cited
DE1156727B
Cited
US3152765A
Cited
GB1074458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |