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US3418772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building mullion
Assignee: ARMCO ATLANTIC Inc A CORP OF DE
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Filing: 1966-12-12
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Granted: 1968-12-31
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Peter E Helgesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:03
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/88; E04B2/96; E04B2/967
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124222A
Cited
US991731A
Cited
US2364083A
Cited
US3002591A
Cited
US3176806A
Cited
US3218768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |