Patent US3434252A successfully refreshed from Google Patents.
US3434252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard for fire and smoke protection
Assignee: Individual
•
Filing: 1967-03-31
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Granted: 1969-03-25
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Expires: 1987-03-31
Abstract
No abstract record available.
Inventors
- 👤 Howard Franklin Dobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:25
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/10
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |