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Patent US3407720A successfully refreshed from Google Patents.
US3407720A
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Assignee: Individual
•
Filing: 1967-01-03
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Granted: 1968-10-29
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Albert M Westerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:19
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/085; F23; F23J; F23J13/00; F23J13/08; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0894; Y10T292/0895; Y10T292/0902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2694358A
Cited
US2749832A
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US2983216A
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US3216343A
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US3274917A
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US3334932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |