US3208776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transition couplings
Assignee: Hydrocarbon Research Inc
•
Filing: 1960-09-06
•
Granted: 1965-09-28
•
Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Herman F Buschow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:34
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/007; B; B22; B22D; B22D19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |