US3453778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug door mechanism
Assignee: Vapor Corp
•
Filing: 1967-04-20
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Granted: 1969-07-08
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Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Kristupas Daugirdas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/008; E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4636
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |