US2500660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment means support arrangement
Assignee: Individual
•
Filing: 1948-10-18
•
Granted: 1950-03-14
•
Expires: 1968-10-18
Abstract
No abstract record available.
Inventors
- 👤 Stephen P Chappen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:47
CPC Classifications
B; B63; B63B; B63B59/00; B63B59/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1413928A
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US699144A
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US702965A
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US936466A
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US998579A
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US2081742A
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US2075369A
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US2212576A
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US2293881A
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US2345834A
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US2425940A
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US2415500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |