US3548555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter structure
Assignee: Alcoa Corp
•
Filing: 1969-01-10
•
Granted: 1970-12-22
•
Expires: 1989-01-10
Abstract
No abstract record available.
Inventors
- 👤 John W Trostle
- 👤 Elton G Kaminski
- 👤 Richard J Hasselbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:56
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2891757A
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US2835001A
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US2869695A
Cited
US3055467A
Cited
US3191242A
Cited
US3165287A
Cited
US3355204A
Cited
US3364643A
Cited
US3341994A
Cited
US3394518A
Cited
US3461629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |