Patent US2928178A successfully refreshed from Google Patents.
US2928178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical plotting and measuring apparatus
Assignee: Seismograph Service Corp
•
Filing: 1953-05-29
•
Granted: 1960-03-15
•
Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:13
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US21041A
Cited
FR366024A
Cited
US841223A
Cited
US864455A
Cited
CH94040A
Cited
US1684887A
Cited
GB342893A
Cited
FR770759A
Cited
US2164216A
Cited
US2422025A
Cited
US2493786A
Cited
US2513641A
Cited
US2480914A
Cited
US2587467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |