US2980854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline surveying
Assignee: Gulf Research and Development Co
•
Filing: 1956-06-28
•
Granted: 1961-04-18
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Dean Howard J En
- 👤 Jones John Delbert
- 👤 Jr Edward Topanelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:56
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2220881A
Cited
US2338991A
Cited
US2371658A
Cited
US2601248A
Cited
US2665187A
Cited
US2672050A
Cited
US2782370A
Cited
US2776564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |