US3073727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool cleaning device and method
Assignee: Mulligram Inc
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Filing: 1959-07-20
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Granted: 1963-01-15
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Lloyd M Mullinix
- 👤 Robert L Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A METHOD OF TREATING SUBMERGED WALLS OF A SWIMMING POOL COMPRISING THE STEPS OF: FORMING A FLUID TREATING AREA ABOUT A PORTION OF THE POOL WALL; METERING FLUID TREATING MATERIAL TO THE FLUID TREATING AREA; SEALING THE FLUID TREATING AREA AGAINST THE TRANSFER OF FLUID WITHIN THE AREA TO THE POOL UNDER CONDITIONS OF NORMAL PRESSURE DIFFERENTIAL; FORMING A PARTIAL VACUUM COMPLETELY AROUND THE FLUID TREATING AREA; RAISING THE PRESSURE WITH-
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |