US2698973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistory building structure
Assignee: Webb & Knapp Inc
•
Filing: 1949-12-22
•
Granted: 1955-01-11
•
Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Zeckendorf William
- 👤 Pei Ieoh Ming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:39
CPC Classifications
E; E04; E04H; E04H1/00; E04H1/02; E04H1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941656A
Cited
GB144913A
Cited
GB155857A
Cited
US1468812A
Cited
FR679826A
Cited
US1886962A
Cited
US2049088A
Cited
US2154897A
Cited
FR836227A
Cited
US2383445A
Cited
US2555157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |