US3527974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector for producing a color corrected light column
Assignee: MACKOWIAK JAN W AND MACKOIAK FREIDA
•
Filing: 1966-10-17
•
Granted: 1970-09-08
•
Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 George D Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/26; F; F21; F21V; F21V9/00; F21V9/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2852980A
Cited
US2660925A
Cited
US2552184A
Cited
US2798943A
Cited
US3099403A
Cited
US3174067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |