US2847901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reading apparatus
Assignee: MICROLEX Corp
•
Filing: 1954-07-27
•
Granted: 1958-08-19
•
Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 Walter R Sassaman
- 👤 Teiser Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:48
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1807614A
Cited
US707084A
Cited
US1344682A
Cited
US1460071A
Cited
US2226618A
Cited
US2326042A
Cited
US2285644A
Cited
US2307211A
Cited
US2338400A
Cited
US2484448A
Cited
US2705436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |