US2421073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet making mechanism
Assignee: Carbide and Carbon Chemicals Corp
•
Filing: 1943-04-26
•
Granted: 1947-05-27
•
Expires: 1963-04-26
Abstract
No abstract record available.
Inventors
- 👤 Edouard M Kratz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:19
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/9145; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US171629A
Cited
US328958A
Cited
US410898A
Cited
US864028A
Cited
US953570A
Cited
US1033282A
Cited
US1604941A
Cited
US1764423A
Cited
US1829153A
Cited
US1961025A
Cited
US2033379A
Cited
US2011354A
Cited
US2051201A
Cited
US2261411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |