US3615966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a ceiling cover structure of swellable plastic sheeting
Assignee: Individual
•
Filing: 1968-10-24
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Granted: 1971-10-26
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Expires: 1988-10-24
Abstract
Abstract For covering a ceiling of a room there is used an integral cover composed of sheets, bound together at their edges, of swellable plastic or rubber sheeting. Prior to being erected in position the plastic sheeting is treated with a swelling agent; the excess is drained off subsequent to the material swelling, whereafter the sheeting after being swollen to an increase in size of at least 2 percent, is erected by means of conventional mechanical attachment means as a ceiling cover structure and the swelling agent caused to evaporate totally, whereupon the sheeting contracts and obtains a flat, stretched surface.
Inventors
- 👤 Sven Olof Birger Ljungbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:22
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/04; E04B9/045; E04B9/30; E04B9/303
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A method according to claim 1, according to which the plastic sheeting is provided with circumferentially extending edge reinforcements facilitating attachment of the sheeting to side portions of the ceiling.
Claim 2
Dependent Claim
18 words
A method according to claim 1 according to which the plaStic sheeting is treated with a curing agent.
Claim 3
Dependent Claim
28 words
A method according to claim 3 wherein the curing agent has a delayed action, which subsequent to applying the sheeting cures the flat, stretched sheet ceiling cover structure.
Claim 4
Dependent Claim
92 words
A method according to claim 1, wherein subsequent to draining excess swelling agent from the swollen plastic sheeting and prior to applying the sheeting to a ceiling, the swollen sheeting is packed in such a way that residual swelling agent is prevented from evaporating, and wherein, to prevent contacting sections of the swollen sheeting from sticking together when said sheeting is rolled up or folded, a temporary intermediate layer of a parting material is applied between said contacting surfaces and removed when the ceiling cover structure is being applied to such ceiling.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |