US2535620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal shingle and strip
Assignee: Individual
•
Filing: 1947-04-21
•
Granted: 1950-12-26
•
Expires: 1967-04-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Alfonso Alvarez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:39
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0864
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2308790A
Cited
US1861998A
Cited
US2187752A
Cited
US2126676A
Cited
US2253105A
Cited
US2292984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |