US2672799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light gate iris
Assignee: Individual
•
Filing: 1946-10-18
•
Granted: 1954-03-23
•
Expires: 1966-10-18
Abstract
No abstract record available.
Inventors
- 👤 Terwilliger Ivan Melville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:24
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/005; G02B30/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US532326A
Cited
US755235A
Cited
US1034943A
Cited
US958367A
Cited
US947490A
Cited
US1171548A
Cited
US1368608A
Cited
US1356343A
Cited
US1471031A
Cited
US1603340A
Cited
US1944230A
Cited
US1912700A
Cited
US2094214A
Cited
US2011002A
Cited
US2160716A
Cited
US2135506A
Cited
US2322752A
Cited
US2375962A
Cited
US2331941A
Cited
US2356178A
Cited
US2424592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |