US2493636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined slide projector case and mounting with forced air cooling device
Assignee: Individual
•
Filing: 1949-02-05
•
Granted: 1950-01-03
•
Expires: 1969-02-05
Abstract
No abstract record available.
Inventors
- 👤 Mills Hiram Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1351765A
Cited
US1716322A
Cited
US1873016A
Cited
US1966351A
Cited
US2139152A
Cited
US2160890A
Cited
US2268450A
Cited
US2281988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |