US650901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper for controllable secret writing.
Assignee: Individual
•
Filing: 1899-04-20
•
Granted: 1900-06-05
•
Expires: 1919-04-20
Abstract
No abstract record available.
Inventors
- 👤 Ernst Kretschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:24
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/14; B41M3/142; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835
Claims Analysis
Total Claims: 0
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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) | 1903-06-05 | 1903-12-05 | 1904-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-06-05 | 1907-12-05 | 1908-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-06-05 | 1911-12-05 | 1912-06-05 | $7700.00 | Window Closed / Lapsed |