Patent US2441829A successfully refreshed from Google Patents.
US2441829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film viewing apparatus
Assignee: W W BOES Co
•
Filing: 1945-08-06
•
Granted: 1948-05-18
•
Expires: 1965-08-06
Abstract
No abstract record available.
Inventors
- 👤 Francis B Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18; G03B1/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1310211A
Cited
DE358663C
Cited
US1131033A
Cited
US1287353A
Cited
FR528196A
Cited
US1548573A
Cited
GB171818A
Cited
US1942929A
Cited
US1573825A
Cited
US1774097A
Cited
FR644324A
Cited
US1873341A
Cited
US1941676A
Cited
US1987406A
Cited
US1977354A
Cited
US1918569A
Cited
US2077860A
Cited
FR776860A
Cited
US2089275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |