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Patent US3444876A successfully refreshed from Google Patents.
US3444876A
Expired / Lapsed
US
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Proportional comparator
Assignee: United States Department of the Army
•
Filing: 1966-09-19
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Granted: 1969-05-20
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Sieracki
- 👤 Carl J Campagnuolo
- 👤 Francis E Blodgett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:03
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/14; F15C1/143; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3080886A
Cited
US3209774A
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US3238959A
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US3340885A
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US3326463A
Cited
US3323532A
Cited
US3366131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |