US2766975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface injector
Assignee: JASPER B HERROD
•
Filing: 1951-12-07
•
Granted: 1956-10-16
•
Expires: 1971-12-07
Abstract
No abstract record available.
Inventors
- 👤 Herrod Ecil Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:38
CPC Classifications
A; A01; A01C; A01C23/00; A01C23/02; A01C23/023; A01C23/026
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2543813A
Cited
US811749A
Cited
GB190518040A
Cited
US1922920A
Cited
US2198998A
Cited
US2212288A
Cited
US2214083A
Cited
US2302799A
Cited
US2325242A
Cited
US2333727A
Cited
US2571871A
Cited
US2540064A
Cited
US2570004A
Cited
US2690717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |