US3521626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine mask for a diver
Assignee: Shimada Rika Kogyo KK
•
Filing: 1968-02-13
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Granted: 1970-07-28
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Expires: 1988-02-13
Abstract
No abstract record available.
Inventors
- 👤 Tomiju Hashimoto
- 👤 Fukusaburo Tokoroyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:51
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; B; B63; B63C; B63C11/00; B63C11/02; B63C11/12; B63C11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |