US2728443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1951-04-13
•
Granted: 1955-12-27
•
Expires: 1971-04-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Clinton B Pike
- 👤 Ralph K Daugherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:28
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/02; B65G47/04; B65G47/12; B65G47/14; B65G47/1407; B65G47/1442; B65G47/1471
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1044067A
Cited
US1865086A
Cited
US1992331A
Cited
US2393334A
Cited
US2555602A
Cited
US2620059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |