US3052330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curtain wall assembly
Assignee: Individual
•
Filing: 1957-12-17
•
Granted: 1962-09-04
•
Expires: 1977-12-17
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Hammitt
- 👤 Jr Herbert L Birum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/88; E04B2/96
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US483948A
Cited
CA520859A
Cited
US2085281A
Cited
US2231528A
Cited
US2265693A
Cited
US2347756A
Cited
US2714431A
Cited
US2781109A
Cited
US2739359A
Cited
US2780328A
Cited
US2885040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |