US1238952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diving-gear.
Assignee: Draegerwerk AG and Co KGaA
•
Filing: 1917-07-06
•
Granted: 1917-09-04
•
Expires: 1937-07-06
Abstract
No abstract record available.
Inventors
- 👤 Hermann Stelzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:17
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/30; Y; Y10; Y10S; Y10S16/00; Y10S16/08
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) | 1920-09-03 | 1921-03-05 | 1921-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-09-03 | 1925-03-05 | 1925-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-09-03 | 1929-03-05 | 1929-09-04 | $7700.00 | Window Closed / Lapsed |