Patent US3500151A successfully refreshed from Google Patents.
US3500151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Search preventative servoamplifiers
Assignee: Phillips Petroleum Co
•
Filing: 1966-10-18
•
Granted: 1970-03-10
•
Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Marvin C Burk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
H; H02; H02P; H02P23/00; H02P23/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3127550A
Cited
US3183425A
Cited
US3327186A
Cited
US3286148A
Cited
US3302085A
Cited
US3340785A
Cited
US3369160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |