Patent US2937580A successfully refreshed from Google Patents.
US2937580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treated highway surfaces
Assignee: —
•
Filing: —
•
Granted: 1960-05-24
•
Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:11
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; E; E01; E01C; E01C7/00; E01C7/08; E01C7/10; E01C7/14; C04B24/00; C04B24/40; C04B24/42; C04B28/04; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/495; C04B41/4961; C04B41/50; C04B41/5076; C04B41/5089; C04B41/60; C04B41/61; C04B41/62; C04B41/64; C04B2111/00; C04B2111/00474; C04B2111/0075; C04B2111/20; C04B2111/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2507200A
Cited
US2574168A
Cited
US2683674A
Cited
US2679491A
Cited
US2706724A
Cited
US2803561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |