US2872120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic flow control unit
Assignee: Boeing Co
•
Filing: 1955-12-21
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Granted: 1959-02-03
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Expires: 1975-12-21
Abstract
No abstract record available.
Inventors
- 👤 Richard H Weiland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:31
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/024; G05D23/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US593595A
Cited
US719568A
Cited
US966096A
Cited
US1443601A
Cited
US1924372A
Cited
US1850963A
Cited
US2513720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |