Patent US3804080A successfully refreshed from Google Patents.
US1735684A
Expired / Lapsed
US
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Method of making air-cell pipe covering
Assignee: CONCENTRIC AIR CELLS AUTOMATIC
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Filing: 1929-07-23
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Granted: 1929-11-12
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Expires: 1949-07-23
Abstract
No abstract record available.
Inventors
- 👤 August P Jurgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/06; F16L59/07; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-11-11 | 1933-05-13 | 1933-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-11 | 1937-05-13 | 1937-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-11 | 1941-05-13 | 1941-11-12 | $7700.00 | Window Closed / Lapsed |