US2828519A
Expired / Lapsed
US
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Assignee: ROLLEN D SCHRIER
•
Filing: 1955-06-20
•
Granted: 1958-04-01
•
Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth E Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:55
CPC Classifications
F; F16; F16G; F16G11/00; F16G11/10; F16G11/02; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/348
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1651081A
Cited
US1656676A
Cited
US1636090A
Cited
US1699381A
Cited
US1853291A
Cited
US1897920A
Cited
US2537326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |