Patent US5681666A successfully refreshed from Google Patents.
Patent DE741259C successfully refreshed from Google Patents.
US2887871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundation support
Assignee: Individual
•
Filing: 1952-12-03
•
Granted: 1959-05-26
•
Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 Erle W Chinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:39
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US332097A
Cited
US1369539A
Cited
US996042A
Cited
US2059095A
Cited
US2138182A
Cited
US2149495A
Cited
US2139225A
Cited
US2347776A
Cited
US2344782A
Cited
US2592022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |