US3016794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvements in projection screens
Assignee: American Optical Corp
•
Filing: 1957-03-08
•
Granted: 1962-01-16
•
Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Harry D Crandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:16
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1043988A
Cited
US1515427A
Cited
US1747425A
Cited
US1856739A
Cited
US2238365A
Cited
US2366761A
Cited
US2367725A
Cited
US2726222A
Cited
US2909204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |