US3485519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily demountable constructional unit
Assignee: Individual
•
Filing: 1967-10-25
•
Granted: 1969-12-23
•
Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph Chak-Fai Chiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:11
CPC Classifications
F; F16; F16B; F16B12/00; F16B12/40; F16B7/00; F16B7/04; F16B7/044; F16B7/0446; F16B12/44; F16B2012/443; F16B2200/00; F16B2200/65; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/343; Y10T403/347; Y10T403/53; Y10T403/55; Y10T403/557
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2926941A
Cited
US2996159A
Cited
BE643648A
Cited
US3314699A
Cited
US3299596A
Cited
US3303581A
Cited
US3344573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |