Patent US2661676A successfully refreshed from Google Patents.
US2661676A
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Apparatus for maintaining predetermined atmospheric conditions in compartments
Assignee: Farr Co
•
Filing: 1948-01-21
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Granted: 1953-12-08
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Expires: 1968-01-21
Abstract
No abstract record available.
Inventors
- 👤 Richard S Farr
- 👤 Willard A Woodworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0018
Claims Analysis
Total Claims: 0
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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) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |