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US2936142A
Expired / Lapsed
US
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Spring hanger
Assignee: Grinnell Corp
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Filing: 1958-07-21
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Granted: 1960-05-10
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Philip C Sherburne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:04
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/16; F16L3/20; F16L3/205; F16L3/2053; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2713982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |