US2929222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption-type heat transfer process and apparatus
Assignee: Borsig GmbH
•
Filing: 1955-06-16
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Granted: 1960-03-22
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Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 Lang Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:20
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/04; F25B49/043
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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |