Patent US1287040A successfully refreshed from Google Patents.
Patent US2439323A successfully refreshed from Google Patents.
US2439323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Riveting machine
Assignee: Douglas Aircraft Co Inc
•
Filing: 1943-02-01
•
Granted: 1948-04-06
•
Expires: 1963-02-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:38
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/22; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53709; Y10T29/5377; Y10T29/53774
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US496059A
Cited
US1875448A
Cited
US791075A
Cited
US1336171A
Cited
US1429665A
Cited
US1556693A
Cited
US1765012A
Cited
US1805282A
Cited
US1816918A
Cited
US1885235A
Cited
US1927085A
Cited
US1823430A
Cited
US1958869A
Cited
US2039114A
Cited
US2032185A
Cited
US2070309A
Cited
US2173583A
Cited
US2163627A
Cited
US2308712A
Cited
US2318852A
Cited
US2355997A
Cited
US2324149A
Cited
US2329709A
Cited
US2365147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |