Patent US1639635A successfully refreshed from Google Patents.
US1639635A
Expired / Lapsed
US
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Pipe hanger
Assignee: ATLAS METAL PARTS Co
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Filing: 1921-05-31
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Granted: 1927-08-16
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Expires: 1941-05-31
Abstract
No abstract record available.
Inventors
- 👤 John P Seyfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:38
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/08; F16L3/12; F16L3/133; F16L3/14
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) | 1930-08-15 | 1931-02-14 | 1931-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-08-15 | 1935-02-14 | 1935-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-08-15 | 1939-02-14 | 1939-08-16 | $7700.00 | Window Closed / Lapsed |