US3087219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1959-01-22
•
Granted: 1963-04-30
•
Expires: 1979-01-22
Abstract
No abstract record available.
Inventors
- 👤 Frank A Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/56; E06B9/78; E06B9/24; E06B9/40; E06B9/42; E06B2009/425
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1686297A
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FR651703A
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US1935685A
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US1890320A
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US2002001A
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US2433171A
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GB651186A
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US2614570A
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FR1127231A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |