US3508736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat ring assemblies for valves
Assignee: Rockwell Manufacturing Co
•
Filing: 1967-05-24
•
Granted: 1970-04-28
•
Expires: 1987-05-24
Abstract
No abstract record available.
Inventors
- 👤 Allen F Rhodes
- 👤 Eldert B Pool
- 👤 Mathew L Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0673
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1868147A
Cited
US2653004A
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GB907621A
Cited
US3055670A
Cited
US3147015A
Cited
US3331582A
Cited
US3373967A
Cited
US3380708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |