US3089377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion insert
Assignee: Individual
•
Filing: 1957-09-04
•
Granted: 1963-05-14
•
Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Henry O Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:16
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/04; F16B13/08; F16B13/0858; F16B37/00; F16B37/12; F16B37/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190505667A
Cited
US1227627A
Cited
US1164322A
Cited
US1621598A
Cited
US1808318A
Cited
US1934232A
Cited
US2102230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |