US3457987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orifice sealing devices
Assignee: Chevron USA Inc
•
Filing: 1967-11-28
•
Granted: 1969-07-29
•
Expires: 1987-11-28
Abstract
No abstract record available.
Inventors
- 👤 Harry G Lampe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0236; F28F9/0241; F28F11/00; F28F11/02; F28F9/22; F28D; F28D7/00; F28D7/16; F28D7/1607
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3203479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |