US2915077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm-flapper assembly
Assignee: Robertshaw Controls Co
•
Filing: 1957-01-30
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Granted: 1959-12-01
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Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wehrli
- 👤 Cecil A Crafts
- 👤 Maynard D Mcfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:35
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; F15B5/00; F15B5/003; G; G05; G05B; G05B11/00; G05B11/44; G05B11/48; G05B11/50; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1920764A
Cited
US2526804A
Cited
US2775254A
Cited
US2767689A
Cited
US2806480A
Cited
US2790427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |