US2862550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated window
Assignee: KEYSTONE ALLOYS Co
•
Filing: 1955-02-03
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Granted: 1958-12-02
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Expires: 1975-02-03
Abstract
No abstract record available.
Inventors
- 👤 John B Zappone
- 👤 Charles F Zappone
- 👤 Alexander H Svetahor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/44; E06B2003/4438; E06B2003/4453; E06B2003/4492
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2611934A
Cited
US2569942A
Cited
US2630891A
Cited
US2626658A
Cited
US2583851A
Cited
US2613403A
Cited
US2728117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |