US3537736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for joining together building units
Assignee: Individual
•
Filing: 1969-02-10
•
Granted: 1970-11-03
•
Expires: 1989-02-10
Abstract
No abstract record available.
Inventors
- 👤 Karl-Gunnar Kroopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:30
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/766; E04B1/00; E04B1/38; E04B1/58; E04B1/5825; E04B1/5831; F; F16; F16B; F16B7/00; F16B7/04; F16B7/044; F16B7/0446; F16B7/0453; F16B7/0466; E04B2001/5856; E04B2001/5881; F16B2200/00; F16B2200/20; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1677058A
Cited
US2242184A
Cited
US2242537A
Cited
GB936988A
Cited
US3186561A
Cited
US3437362A
Cited
US3410584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |