US3438438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor-packer
Assignee: Individual
•
Filing: 1967-05-22
•
Granted: 1969-04-15
•
Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:36
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/126; E21B33/1265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1549168A
Cited
US2082112A
Cited
US2196658A
Cited
US2652894A
Cited
US2691418A
Cited
US2884070A
Cited
US2970651A
Cited
US3306361A
Cited
US3318605A
Cited
US3343607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |