US3520512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical plug cocks
Assignee: Istag AG Suhr AG
•
Filing: 1967-09-05
•
Granted: 1970-07-14
•
Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Richard Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0626; F16K5/0631; F16K5/0663; F16K5/0673; F16K5/08; F16K5/14; F16K5/20; F16K5/205; F16K5/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2861773A
Cited
US2942840A
Cited
DE1207168B
Cited
US3082992A
Cited
GB977442A
Cited
US3281112A
Cited
US3346233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |