US3023995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing and coupling structures
Assignee: Individual
•
Filing: 1958-07-21
•
Granted: 1962-03-06
•
Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 William C N Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/10; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1216
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2735642A
Cited
US1800085A
Cited
US2083842A
Cited
GB556010A
Cited
GB576772A
Cited
US2546638A
Cited
US2746709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |