US2004652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making cylinder packings
Assignee: Westinghouse Air Brake Co
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Filing: 1933-10-28
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Granted: 1935-06-11
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Expires: 1953-10-28
Abstract
No abstract record available.
Inventors
- 👤 Philip W Dempsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
B; B29; B29C; B29C31/00; B29C31/006; B29C43/00; B29C43/02; B29C43/20; B29C43/203; B29C43/32; B29C43/36; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/345; B29C70/40; B29C70/42; B29C70/46; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0809; B29L; B29L2031/00; B29L2031/26; Y; Y10; Y10S; Y10S220/00; Y10S220/12; Y10S277/00; Y10S277/924; Y10S425/00; Y10S425/812; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1034; 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) | 1938-06-10 | 1938-12-10 | 1939-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-10 | 1942-12-10 | 1943-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-10 | 1946-12-10 | 1947-06-11 | $7700.00 | Window Closed / Lapsed |