US2935985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airtight helmet
Assignee: International Latex Corp
•
Filing: 1951-11-19
•
Granted: 1960-05-10
•
Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Andrews
- 👤 Wilbur A Miller
- 👤 Walter L Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:08
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04; B; B64; B64D; B64D10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE51303C
Cited
FR331856A
Cited
US1606531A
Cited
FR801610A
Cited
US2404567A
Cited
FR889783A
Cited
US2465973A
Cited
US2437755A
Cited
US2648843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |