Patent US261558A successfully refreshed from Google Patents.
Patent US3052491A successfully refreshed from Google Patents.
US3052491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible connector for rigid pipes
Assignee: Individual
•
Filing: 1959-03-23
•
Granted: 1962-09-04
•
Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Otto R Grass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:08
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/113; F16L27/1133; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/451; Y10T403/452
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |