US3461607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke and heat vent
Assignee: Plasteco Inc
•
Filing: 1967-08-11
•
Granted: 1969-08-19
•
Expires: 1987-08-11
Abstract
No abstract record available.
Inventors
- 👤 Kiyoshi Sandow
- 👤 George H Allen
- 👤 Thomas L Anderton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:10
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/24; A62C2/241; A62C2/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US706829A
Cited
US1975701A
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US2565202A
Cited
US2812835A
Cited
US3036406A
Cited
US3017721A
Cited
US3251158A
Cited
US3236343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |