Patent US2612818A successfully refreshed from Google Patents.
US2612818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for projectors for projecting stereoscopic pictures
Assignee: H STERLING AMES
•
Filing: 1950-06-09
•
Granted: 1952-10-07
•
Expires: 1970-06-09
Abstract
No abstract record available.
Inventors
- 👤 William J R Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:27
CPC Classifications
G; G03; G03B; G03B35/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US953879A
Cited
GB160512A
Cited
US1655850A
Cited
US1503766A
Cited
US1948901A
Cited
US2268338A
Cited
US2314174A
Cited
US2289521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |