Patent US91672A successfully refreshed from Google Patents.
US91672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved metallic roofing
Assignee: —
•
Filing: —
•
Granted: 1869-06-22
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Expires: 1886-06-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:07
CPC Classifications
E; E04; E04B; E04B7/00; E04B2/00; E04B2/02; E04B2002/0202; E04B2002/0204; E04B2002/0206; Y; Y10; Y10S; Y10S425/00; Y10S425/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1872-06-21 | 1872-12-21 | 1873-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1876-06-21 | 1876-12-21 | 1877-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1880-06-21 | 1880-12-21 | 1881-06-22 | $7700.00 | Window Closed / Lapsed |