US2687590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film mount
Assignee: Johnson and Quin Inc
•
Filing: 1951-10-11
•
Granted: 1954-08-31
•
Expires: 1971-10-11
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:47
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US143878A
Cited
US522484A
Cited
US2149488A
Cited
FR332929A
Cited
GB276178A
Cited
GB382105A
Cited
US2385541A
Cited
US2421503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |