Patent US3454073A successfully refreshed from Google Patents.
US3454073A
Expired / Lapsed
US
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Window unit with roll-type slats
Assignee: TRANS CONTINENTAL ENG CORP
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Filing: 1967-02-08
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Granted: 1969-07-08
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Expires: 1987-02-08
Abstract
No abstract record available.
Inventors
- 👤 Henry H Man
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:20
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B9/08; E06B9/11; E06B9/17; E06B9/17007; E06B9/17015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1723487A
Cited
US2019084A
Cited
US2827113A
Cited
BE551546A
Cited
BE622215A
Cited
US2984299A
Cited
US3055419A
Cited
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 |