US2600413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand stencil duplicator
Assignee: Individual
•
Filing: 1948-04-16
•
Granted: 1952-06-17
•
Expires: 1968-04-16
Abstract
No abstract record available.
Inventors
- 👤 Porter H Mason
- 👤 William D Mason
- 👤 Jack H Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
B; B41; B41K; B41K1/00; B41K1/22; B41K1/24; B41K1/32; B41K1/36; B41K1/38; B41K1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1142106A
Cited
US1617278A
Cited
US1782877A
Cited
US2020151A
Cited
US2233065A
Cited
US2335992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |