US3018859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking extrusions
Assignee: Individual
•
Filing: 1959-08-27
•
Granted: 1962-01-30
•
Expires: 1979-08-27
Abstract
No abstract record available.
Inventors
- 👤 Francis L Struben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/343; E04B1/34315; E04B1/18; E04B1/24; E04B2/00; E04B2/56; E04B2/58; E04B2/60; E04B1/2403; E04B2001/2463; E04B2001/2481; E04B2001/249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1265990A
Cited
US1284758A
Cited
US1669382A
Cited
US2023047A
Cited
US2616531A
Cited
US2624428A
Cited
US2963131A
Cited
US2910154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |