US3007577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrator
Assignee: Individual
•
Filing: 1958-09-19
•
Granted: 1961-11-07
•
Expires: 1978-09-19
Abstract
No abstract record available.
Inventors
- 👤 William T Putman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
B; B03; B03B; B03B4/00; B03B4/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US76331A
Cited
US1006921A
Cited
US1634898A
Cited
US1648716A
Cited
US2022585A
Cited
US2283051A
Cited
US2635753A
Cited
US2828016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |