Patent US2964879A successfully refreshed from Google Patents.
US2964879A
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US
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Air cooling system
Assignee: Armstrong World Industries Inc
•
Filing: 1956-07-16
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Granted: 1960-12-20
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Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 William R Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:34
CPC Classifications
C; C03; C03B; C03B9/00; C03B9/30; C03B9/38; C03B9/3875; C03B9/3891; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8807
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |