US2354108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying apparatus
Assignee: GAF Chemicals Corp
•
Filing: 1941-03-28
•
Granted: 1944-07-18
•
Expires: 1961-03-28
Abstract
No abstract record available.
Inventors
- 👤 Flemming Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73
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) | 1947-07-18 | 1948-01-17 | 1948-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-18 | 1952-01-17 | 1952-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-18 | 1956-01-17 | 1956-07-18 | $7700.00 | Window Closed / Lapsed |