US1712854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photograph-enlarging machine
Assignee: SPRAGUE HATHAWAY Manufacturing CO
•
Filing: 1926-07-26
•
Granted: 1929-05-14
•
Expires: 1946-07-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Thonet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/326
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-05-13 | 1932-11-12 | 1933-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-05-13 | 1936-11-12 | 1937-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-05-13 | 1940-11-12 | 1941-05-14 | $7700.00 | Window Closed / Lapsed |