Patent US2506728A successfully refreshed from Google Patents.
US2506728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint
Assignee: Carrier Corp
•
Filing: 1945-03-16
•
Granted: 1950-05-09
•
Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
- 👤 William L Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:47
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/14; B23K11/00; B23K11/16; B23K11/163; B23K35/00; B23K35/22; B23K35/226
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US572234A
Cited
US1960120A
Cited
US2204617A
Cited
US2137623A
Cited
FR825910A
Cited
US2243832A
Cited
GB558124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |