US3527059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling parallel-operating refrigeration compressors
Assignee: Phillips Petroleum Co
•
Filing: 1968-12-26
•
Granted: 1970-09-08
•
Expires: 1988-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jack R Rust
- 👤 Hadwen A Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
F; F04; F04D; F04D27/00; F04D27/02; F04D27/0269; F25; F25B; F25B1/00; F25B1/04; F25B49/00; F25B49/02; F25B49/022; F25J; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0047; F25J1/0052; F25J1/006; F25J1/008; F25J1/0087; F25J1/02; F25J1/0203; F25J1/0208; F25J1/0209; F25J1/021; F25J1/0243; F25J1/0279; F25J1/0281; F25J1/0283; F25J1/0294; F25J1/0298; F25B1/10; F25B2400/00; F25B2400/06; F25B2400/07; F25B2400/075; F25J2245/00; F25J2245/02; F25J2280/00; F25J2280/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |