Patent US3036256A successfully refreshed from Google Patents.
US3036256A
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US
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Baffle partitioned capsule for door operators
Assignee: Individual
•
Filing: 1959-03-12
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Granted: 1962-05-22
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Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:22
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/77; E05F15/78
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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |