US2745340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture control device for rotary duplicating machines
Assignee: Individual
•
Filing: 1952-01-16
•
Granted: 1956-05-15
•
Expires: 1972-01-16
Abstract
No abstract record available.
Inventors
- 👤 Ritzerfeld Wilhelm
- 👤 Ritzerfeld Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:41
CPC Classifications
B; B41; B41L; B41L7/00; B41L7/02; B41L7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1183529A
Cited
US2041943A
Cited
US2225749A
Cited
US2231639A
Cited
US2221634A
Cited
US2238359A
Cited
US2262511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |