US2768692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cut-off mechanism
Assignee: Individual
•
Filing: 1952-12-05
•
Granted: 1956-10-30
•
Expires: 1972-12-05
Abstract
No abstract record available.
Inventors
- 👤 William H Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:39
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/14; B31B70/16; B31B2160/00; B31B2160/10; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4836; Y10T83/4844
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US753061A
Cited
US1616752A
Cited
US1144630A
Cited
US1208019A
Cited
US1651096A
Cited
US1970352A
Cited
US1907256A
Cited
US2053030A
Cited
US2142213A
Cited
GB541897A
Cited
GB608175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |