US2835059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display card
Assignee: GROTON PRODUCTS Ltd
•
Filing: 1953-11-23
•
Granted: 1958-05-20
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Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Groh Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:34
CPC Classifications
G; G09; G09F; G09F1/00; G09F1/04; G09F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US588245A
Cited
US1477123A
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US1687136A
Cited
US1794311A
Cited
GB452120A
Cited
US2401615A
Cited
US2613140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |