Patent US3453425A successfully refreshed from Google Patents.
US3453425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for concentrating radiant energy
Assignee: SIDNEY L WHITAKER
•
Filing: 1965-10-21
•
Granted: 1969-07-01
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Sidney L Whitaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:27
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/004; G02B19/00; G02B19/0004; G02B19/0019; G02B19/0023; G02B19/0033; G02B19/0047; F; F21; F21V; F21V7/00; F21V7/0025; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1588816A
Cited
US1981328A
Cited
US2001378A
Cited
US2741691A
Cited
GB763376A
Cited
US3242806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |